Titanium alloys are initially applied to aerospace industry and have been used widely in the applications of chemical industry, medical industry, and so on. In the past few years, the import quantity of titanium metal in Taiwan grew 4.67%, from 750 metric tons in 1994 to 3500 metric tons in 1997. Obviously, it implies the potentiality of titanium industry in Taiwan. The content of this article includes the physical metallurgy, fabrication, converting technology and rolling process of titanium alloys.