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Titanium Alloy Machining

Grade 3Al 25V Titanium CNC Machining

Ti-3Al-2.5V parts cut, turned and finished to ±0.005 mm. We machine tubing, billet and near-net blanks for hydraulic, aerospace and medical programs, with material certificates and inspection reports on request.

Ti-3Al-2.5VUNS R56320±0.005 mmOne piece to 10,000+ISO 9001 / IATF 16949
cnc-alloy-steel
15 yearsTitanium machining since 2011
127High-precision CNC machines
±0.005 mmAchievable tolerance
99.99%Qualification rate
Common problems

Where Ti-3Al-2.5V parts go wrong

This alloy behaves differently from Ti-6Al-4V. Most scrap comes from three or four repeat mistakes.

01

Do your thin-wall tubes spring back after turning?

Tubing is often turned down to a 0.5 mm wall. Too much radial depth or a dull insert pushes the wall outward, and the bore closes up after the chuck releases. The part measures oversize on the OD and undersize on the ID, so the whole length is scrapped.

02

Are you burning through inserts on every batch?

Titanium conducts heat poorly, so the cutting edge carries almost all of it. Run the surface speed too high and the insert fails in minutes. Run it too low with a heavy feed and you get chatter instead. Both routes raise cost per part and leave a torn surface.

03

Does the finish fail a hydraulic or medical spec?

A turned surface at Ra 3.2 μm will not pass a seal or a cleanroom requirement. If the shop has no way to measure and then improve the finish, you find out at incoming inspection, not before. Rework usually means a second setup and a new lot of material.

04

Can the shop actually prove where the metal came from?

Aerospace and medical buyers need the mill certificate tied to the heat number on the part. Without it, a lot sits in quarantine. Paperwork that arrives after the parts is nearly as bad as no paperwork at all.

How we run it

Cutting Ti-3Al-2.5V without wrecking the part

Two things decide the outcome: how the blank is held, and how the heat leaves the cut.

CNC Lathe Technical Specifications Terminology
Setup and workholding

Hold thin walls from the inside

Ti-3Al-2.5V sits between commercially pure titanium and Ti-6Al-4V. It machines closer to the pure grades, so it cuts more freely than Grade 5, but it still work-hardens at the surface and it still pushes back on the tool. On thin-wall tubing we support the bore with a close-fitting mandrel or expand the part onto a fixture, then take light radial passes. That keeps the wall from deflecting away from the insert.

For longer tube parts we turn between centers or use a steady rest on the Ø400 mm rotary table. Wall thickness down to 0.5 mm is routine when the support is right. When it is not, no amount of feed tuning will save the part.

  • 1
    Bore supportMandrel or expanding fixture for walls under 1 mm
  • 2
    Light radial passesCuts deflection before it shows up as taper
  • 3
    Steady restHolds long tube runs stable between operations

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Cutting strategy

Keep the heat in the chip, not the edge

We run titanium with sharp, uncoated carbide or a PVD-coated grade, high pressure coolant aimed at the flank, and moderate surface speed. Feed per tooth stays high enough to get under the work-hardened layer instead of rubbing on it. That combination is what keeps tool life predictable across a batch.

On the 16 simultaneous 5-axis centers we can reach faces that would need three setups on a 3-axis machine. Each extra setup on titanium is another chance to lose position and another chance to scrap the part, so fewer setups usually means tighter results.

  • 1
    Sharp geometryLow cutting forces, less surface work hardening
  • 2
    High pressure coolantCoolant through the tool at the cutting zone
  • 3
    One setup where possible5-axis access cuts position error and handling
Material comparison

Is Ti-3Al-2.5V the right pick?

Where the alloy wins and where it does not.

AlloyTypical useTrade-off
Ti-3Al-2.5V (Grade 9)Hydraulic tube, thin-wall partsLower strength than Grade 5
Ti-6Al-4V (Grade 5)High-load structural partsHarder to cut, slower cycle
Commercially pure TiChemical and marine partsLow strength, easy to form
Stainless 316LGeneral corrosion serviceHeavier, no weight saving
What we do

Machining services for titanium parts

One shop for the whole route from blank to finished surface.

01

5-axis machining

16 simultaneous 5-axis centers for contoured and multi-face titanium parts. Fewer setups means less position error on complex geometry.

02

CNC turning

Tube, shaft and bushing work on mill-turn centers. Bore support and steady rests for thin walls down to 0.5 mm.

03

3-axis and 4-axis milling

Plates, brackets and housings. Good fit when the part has flat faces and the volume is steady.

04

Rapid prototyping

One-off and small lots, no minimum order quantity. Useful for checking fit before a production run.

05

Surface finishing

Bead blasting, tumbling, brushing and polishing. Anodizing and laser marking available for traceability.

06

Inspection and reporting

100% inspection before shipment, with reports on request. Raw material check, in-process monitoring, final inspection.

Capability range

What we can hold on titanium

Numbers from our own floor.

ItemRangeNotes
Tolerance±0.005 mmOn critical features
FinishRa 0.2–0.8 μmPolished and fine-turned surfaces
Max part size4,000 mmMaximum processing size
Lot size1 to 10,000+No minimum order quantity
Why GreatLight

What you get on a titanium order

15Y

Titanium since 2011

Fifteen years cutting titanium and its alloys. The process knowledge is on the floor, not in a brochure.

±0.005

Tolerance in mm

Held on critical features. We tell you up front when a drawing asks for more than the process can repeat.

127

CNC machines

Across 3 wholly-owned plants covering 7,600 m², so capacity is not held up by one spindle.

12h

Quote turnaround

Quotation and free DFM analysis within 12 hours. Production can start within 24 hours.

100%

Inspection

Every part inspected before shipment. Material certificates and dimensional reports on request.

NDA

Confidential files

Uploads are secure and stay confidential. A non-disclosure agreement is available on request.

3Wholly-owned plants
150Technicians
99.99%Qualification rate
<2%Historical late-delivery risk
Industry fit

Where these parts end up

CNC Machining Services Comparison 2026 Fictiv vs Xometry vs GreatLight

Aerospace tubing

Hydraulic lines and duct parts. Wall sections held without ovality, mill certificates tied to the heat number.

  • ±0.005 mm
  • Material traceability
Forge ahead with determination and create the future together.

Medical instruments

Handles, frames and small housings. Clean surfaces without torn machining marks, finished for the next process step.

  • Ra 0.2–0.8 μm
  • ISO 13485
6011

Automotive and EV

Lightweight brackets and fittings. Weight saved against steel, with IATF 16949 process control behind the run.

  • Weight reduction
  • IATF 16949
GreatLight Metal new factory building

Industrial machinery

Pump and valve components. Repeatable batches from one prototype to 10,000+ parts without a minimum order quantity.

  • 1 to 10,000+
  • 99.99% qualification
FAQs

Questions engineers ask us

How is Ti-3Al-2.5V different from Ti-6Al-4V in the machine?

Ti-3Al-2.5V has less aluminum and vanadium, so it is lower in strength and cuts more easily. Tool life is longer and cycle times are shorter than with Grade 5.

The trade-off is strength. If the part carries a high structural load, Grade 5 is usually the better pick. Grade 9 is the usual choice when you want weight saving, corrosion resistance and good formability in tube or thin-wall form.

Can you machine thin-wall tubing without it going out of round?

Yes, with the right support. We back the bore with a mandrel or an expanding fixture and take light radial passes rather than heavy ones.

Walls down to 0.5 mm are routine when the setup is correct. Send the tube OD, ID and length and we will confirm before quoting.

What surface finish can you hold on titanium?

We work to Ra 0.8–1.6 μm as a standard machined finish, and Ra 0.2–0.8 μm when the drawing calls for it.

Finish and tolerance interact. A very fine finish on a thin wall is harder to hold than the same finish on a solid part, so we check both together.

Do you supply material certificates?

Yes. Mill certificates are available on request, and we keep the heat number tied to the part through the run.

If your program needs a dimensional report or first-article documentation, tell us at quote stage so it goes into the plan.

What is the smallest order you accept?

There is no minimum order quantity. We run from one prototype to 10,000+ part runs.

Single pieces are useful for fit checks before you commit to a production batch. The setup cost is the same either way, so a one-off is not a reason to go elsewhere.

How fast can you quote and ship?

Quotation and free DFM analysis come back within 12 hours. Production can start within 24 hours of approval.

Typical parts ship in 3–5 days. That depends on the operation list, so we confirm the date in the quote rather than after the order.

Can you work from my 3D file and drawing?

Yes. STEP, IGES and native CAD files all work. A 2D drawing helps where tolerances, datums or finishes matter.

If the file is missing something the process needs, we raise it during the DFM review instead of guessing on the floor.

How do you handle confidentiality?

Uploads are secure and confidential. A non-disclosure agreement is available on request before you send files.

We do not publish customer names or part details from programs under NDA.

Send your titanium part for a quote

Upload the model and drawing. You get a quotation and a DFM review within 12 hours.

12-hour quote100% inspectionNo minimum order quantity

Trusted by engineers and manufacturers worldwide

Tesla Ford Motor Company BYD Auto Denso Magna International Boeing Airbus Medtronic KUKA FANUC