Titanium is an important structural metal developed in the 1950s. Titanium alloys are widely used in various fields because of their high specific strength, good corrosion resistance and high heat resistance. Many countries in the world are aware of the importance of titanium alloy materials, have their research and development, and has been practical application. Titanium is the periodic table class IVB elements, the appearance of like steel, melting point of 1 672 ℃, is a refractory metal. Titanium in the crust is rich in content, much higher than Cu, Zn, Sn, Pb and other common metals. China's titanium resources are extremely rich, only Sichuan Panzhihua area found in large vanadium-titanium magnetite, associated titanium reserves of about 420 million tons, close to the sum of foreign reserves of titanium reserves. Titanium alloy can be divided into heat-resistant alloy, high strength alloy, corrosion resistant alloy (titanium-molybdenum, titanium-palladium alloy, etc.), low temperature alloy and special functional alloy (titanium-iron hydrogen storage material and titanium-nickel memory alloy)