The 3D printing technology, called "laser Laser Manufacturing (Additive)", can "print" almost any shape of the product by laser melting the metal powder. Its greatest feature is the use of materials for metal, "print" products with high mechanical properties and can meet the needs of aerospace, mold, automotive, medical, dental, crafts, and other different industries. Picture Description: 3D printing technology in many areas have entered the practical stage 3D printing technology can be traced back to 1984, Hull Charles first developed from digital data print out the 3D object technology and in 2 years after the development of the first commercial 3D printing machine. Then in the whole 90 years to continuously improve its basic technology and norms, and in twenty-first Century, put into the application. Titanium is a density of only half of the steel, the strength is far better than the vast majority of the alloy material, is widely used in the aerospace industry. The United States is the earliest development of titanium alloy 3D printing technology. In 1985, the United States in the Department of defense under the guidance of secretly began forming technology of titanium alloy laser research, and in the public in 1992 Then the United States continued to develop this technology, and in 2002 the laser forming titanium alloy parts loaded on the aircraft test.However, due to the technical problems of deformation and fracture of titanium alloy during the manufacturing process, the United States can not produce high strength and large size laser forming titanium alloy components. In 2005, the United States engaged in titanium alloy laser rapid prototyping manufacturing business of commercial companies Aeromet as always unable to produce performance meet the main force bearing requirement of the large size of complex titanium alloy component, there is no market application value and collapse. Other national laboratories in the United States can not overcome thisproblem, at present only the small size of titanium alloy parts of the printing and titanium alloy parts surface repair. Chinese titanium alloy 3D printing catch up from behind.The laser forming technology of titanium alloy in our country started late, until the United States of America in 1995 3 years to decrypt its R & D program began to invest in research. Early basically belongs to follow the United States to study, in the country more than universities and Research Institute set up laboratory for research. Among them, the success of the aircraft laser technology team is the most significant. As early as in 2000, before and after, AVIC laser technical team has already begun into the 3D laser welding rapid prototyping technology R & D and in countries especially military funding for the continued support,after several years of research and development, to solve the "inert gas protection system, thermal stress discrete force", "defects", "crystal growth control" and so on a number of technical problems in the world, producing a complex structure, size to 2.4m, and performance to meet the main load-bearing structure of the products, with the commercial value. At present, our country already has the technology and ability to use the laser formed more than 12 square meters of complex titanium alloy components, and put into a number of domestic aviation research projects in the prototype and product manufacturing. Become the only one in the world to master the laser forming titanium alloy large main bearing component manufacturing and assembly machine engineering application of the country.