Research progress in preparation technology of micro and nano titanium alloy powder

Abstract Titanium alloys have excellent properties and are widely used in aerospace, medicine, chemical industry, and other fields. With the rapid development of the powder metallurgy and 3D printing industries, the demand for ultra-fine titanium alloy powders has increased significantly. It should be noted that the particle size of titanium alloy powders determines the application process. However, the high melting point of titanium and titanium alloys and the limitation of many factors, such as the prepared powders being easily contaminated by secondary pollution, make the preparation cost higher, which restricts their promotion and application. In this study, the research progress of micro and nano titanium alloy powder preparation process is described, and the existing problems of various processes are analyzed and discussed, and it is proposed that the direct reduction in TiO2 to obtain micro and nano titanium alloy powder is the key research direction in the future. In particular, the preparation of micro and nano titanium alloy powder by “calciothermic self-propagation process” has great industrial potential.