Research Progress on Selective Laser Melting 3D Printing of Titanium Matrix Composites

Selective laser melting (SLM) 3D printing technology is a rapidly developing technology of metal additive manufacturing in recent years. Because of its designability, rapid net forming of complex components, high surface quality and other advantages, it has a wide range of application prospects. Titanium matrix composites based on SLM technology can usually obtain nano ceramic reinforcing phase, which has better performance than titanium alloy, and the mechanical properties of formed components are better than those of castings and forgings. In this paper, the development status of titanium matrix composite based on SLM technology in recent years was reviewed, the selection of ceramic reinforcements was used as an entry point to describe its typical microstructure characteristics and evolution laws, and its properties was also discussed and its unique strengthening mechanism was analyzed. And on this basis, the key academic problems needed to be solved and development direction in the future were prospected. © 2021, Science Press. All right reserved.