Titanium and titanium alloys from the realization of industrial production so far only 50 years, because of its low density, high specific strength, corrosion resistance, small coefficient of linear expansion, biocompatibility and a series of excellent characteristics, at the same time, titanium in the earth's crust is rich, so there is a wide range of prospects for the application of the development of a very fast, within a short period of time has shown its strong vitality, into the aerospace industry, the energy industry, maritime transportation industry, Chemical industry and health care and other indispensable materials. Titanium and titanium alloys in the molten state with high chemical activity, will be commonly used with a variety of refractory material chemical reaction, melting and casting molding difficulty, resulting in complex processing conditions, the cost is more expensive, to a large extent, to limit their application. Therefore, the development and application of titanium and titanium alloys lag far behind steel, iron, aluminum, copper and other metals and alloys.