The history of Japan’s application of titanium alloys on rockets can be traced back to 1968. Japan’s first test satellite "Bighorn" used Ti-2Al-2Mn titanium alloy. Examples of other applications are the leading edge of the organic wing and the clamping of the nozzle Device, fracture joints of multi-stage rockets, etc. The low temperature structure titanium alloy LT700 (Ti-3Al-5Sn-1Mo-0.2Si) developed in Japan has been used to make liquid hydrogen turbo pumps