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turning and milling of titanium

Titanium combines high strength with low weight and outstanding biocompatibility – an ideal material for medical technology and aerospace, but one of the most demanding in machining.

The special properties that make titanium so valuable also make it difficult to machine. Pure titanium (e.g. ASTM F 67) and alloys such as Ti-6Al-4V ELI (ASTM F 136) are used wherever lightweight construction, corrosion resistance and biocompatibility are required.

Why titanium is difficult to machine

  • Low thermal conductivity: The process heat is concentrated at the cutting edge instead of being dissipated via the chip
  • High responsiveness: At high temperatures, titanium tends to react with the tool
  • Springback: makes maintaining tight tolerances on thin-walled parts more difficult

Manageable with experience

With adjusted cutting data, suitable cutting materials and effective cooling, titanium can be machined safely and reproducibly. Laser welding is additionally used for permanently joined components. Especially for highly stressed implant components, the interplay of machining, finishing and surface quality is decisive – for internal surfaces, surface roughness values down to the range of a few hundredths of a micrometre are aimed for.