Abstract: Titanium alloy is the most widely used metal material in 3D printing, which has the advantages of low density, high specific strength, good heat resistance, excellent corrosion resistance and good biocompatibility. Different from the traditional manufacturing technology, 3D printing technology has a very high demand for powder materials, and the quality of powder will directly affect the performance of 3D printing components. The influence of impurity content, fluidity and bulk density in the 3D printing process is described. Then the principle, advantages and disadvantages of hydrogenation and dehydrogenation, gas atomization, centrifugal atomization and plasma atomization are reviewed. Finally, according to the present research situation at home and abroad, methods of improving titanium alloy powder are discussed.

Key words: titanium alloy, powder properties, preparation technology, optimization method