Titanium Machined Parts Surface Finishing Guide for Aerospace Suppliers: the 2026 production season Guide No.174

The titanium machined parts market in Switzerland rewards buyers who issue a complete drawing package, because an incomplete specification is the single biggest cause of quotation delay. The notes below work as a checklist for Aerospace Suppliers that need a part which meets the drawing and still hits the target cost.

Documents and Standards to Request

Request material certificates, dimensional reports and, where relevant, first article inspection reports with the shipment. Surface treatments and coatings carry their own documentation, so keep the process certificates on file for the programme. For Switzerland, check the rules on restricted substances, packaging materials and marking before the parts are boxed. A declaration of conformity should reference the standard and the revision, not just the supplier's name and stamp.

Process Capability and Tolerances

Ask how the part will be held during machining, because fixture design usually decides whether a tolerance is repeatable. Discuss deburring explicitly, since unstated edge requirements are the most common cause of disputes on machined parts. Tolerance is a cost driver, so release only the tolerances the function demands rather than the tightest number that fits on the drawing.

Industry Demand and Buying Cycles

Because titanium machined parts usually sit inside a larger assembly, a late delivery is more expensive than a slightly higher unit price. Industrial buyers in Switzerland usually qualify a supplier once and then scale volume, which means the first small order carries most of the risk. The strongest titanium machined parts programmes share one habit: they are planned against a build schedule rather than against a purchase order date. A single rejected lot can stop an assembly line, so titanium machined parts are bought on evidence rather than on price alone.

Inspection That Prevents Rejects

The critical test for titanium machined parts is hardness and surface integrity check, and it belongs on the inspection plan as a numbered characteristic. Track the reject rate by characteristic rather than only in total, so you can see whether the process is drifting. Book a first article inspection before the run is released, and require the report to list every dimension against the drawing. Agree the sampling plan and the inspection level in writing, so acceptance is a calculation rather than an opinion.

Cost Structure and Quotation

Setup cost is spread across the batch, so a small batch carries a disproportionate share of programming and tooling time. Most quotation gaps come from a different material grade, a different finishing route or a different inspection level, not from shop margin. Watch the metal index and the energy surcharge, because both move the cost of titanium machined parts during a long programme. The price of titanium machined parts breaks into material, machining time, setup, finishing, inspection and margin, and only some of those move with volume.

Material Selection

Cheap substitutes usually appear in the material grade and the finishing step, so inspect those areas first. For titanium machined parts, the process matters as much as the material: watch the cutting parameters and coolant strategy. State the material standard, the temper condition and the traceability requirement by number, not by adjective. The capability buyers pay for is high strength at low weight, and it comes from the grade 5 (Ti-6Al-4V) titanium combined with a controlled process.

Buyer Checklist

If you freeze the revision, approve the first article, agree the inspection plan, confirm the packing and file the documents, the order takes care of itself.