At present it has become the preferred metal material for replacement or repair of artificial joints artificial bones broken bone bindings spinal correction rods intramedullary nails artificial heart valves dental implants skull and other products The world's population is nearly 65 billion and the global aging problem is very serious According to the data of F & S Company the compound growth rate of the global orthopaedic implant device market in the past five years titanium filler rod is about 104% which is expected to reach 277 billion US dollars by 2015 while the Chinese orthopaedic implant device market will grow to 166 billion US dollars with a compound annual growth rate of 181% It can be seen that titanium and its alloys are the preferred materials for medical metal materials and their future market demand is very strong Therefore it is of great significance to increase the research and development and application promotion of medical titanium and its alloys in China 2 Research and development status of titanium materials for surgical implants 21 Vanadium-free medical titanium alloy Ti-6Al-7Nb alloy is a medical alloy developed by Sulzer Medical