Ti-6Al-2Sn-4Zr-6Mo is kind of α+β titanium alloy that can be strengthened by solution treatment, developed in the late 1960s by Pratt Whitney Company in USA. The long-term use of temperature of this alloy can up to 450℃, which is lower a little than that of Ti-6Al-2Sn-4Zr-2Mo high temperature alloy. But Ti-6Al-2Sn-4Zr-6Mo is of higher strength at the high temperature, which is used for manufacture of aircraft engine spare parts with high bearing capacity in middle temperature sectionlike discs of compressor etc. At the same time, the short-term use of temperature of Ti-6Al-2Sn-4Zr-6Mo alloy can up to 540℃. Besides having excellent strength of high temperature and creep resistance, Ti-6246 alloy is not sensitive for fatigue way with full load. This alloy become the first choice material of compressor spare parts working for long time at 400℃-450℃ in order to meet long life and high reliable design requirement of aircraft engine.