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A series of thermal oxidising treatments has been carried out on V alloy at temperatures ranging from 600 to 850°C to develop a new surface engineering technique for Ti-6Al-4 V and other titanium alloys. Systematic characterisation of the thermal oxidation treated surface layers was performed using GDS, XRD, SEM, and nanoindentation testing. Ball on disc friction tests show that the coefficient offriction of a Ti-6Al-4 V disc against an alumina ball was significantly reduced after oxidation treatment. The rolling-sliding wear resistance of Timetal 6-4 material against hardened 709 M 40 steel under lubricated conditions has been

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