Titanium alloy 3D printing technology, as a cutting-edge manufacturing technology that integrates design and manufacturing, has attracted widespread attention in recent years and has shown broad application prospects in high-precision and cutting-edge fields such as aerospace, national defense and military, biomedical, and automotive high-speed rail. However, compared to traditional manufacturing technology, it started relatively late and has a development history of only about 30 years. There is still a significant gap compared to advanced countries in the world, For example, the forming efficiency of titanium alloy parts is low, the accuracy has not yet reached a high precision level, the preparation cost of equipment and materials is high, and large-scale industrial and commercial applications have not yet been achieved, especially the problem of suppressing defects in formed parts. At present, the research on defects in the forming process of parts in China, such as spheroidization, cracks, pores, and warping deformation, is still in the initial stage, and there is still a lot of research work urgently needed. The development trend of titanium alloy 3D printing technology in the future is as follows:

(1) In terms of materials, research and develop new production equipment and preparation processes for spherical titanium alloy powder, improve the quality of titanium alloy powder (particle size, sphericity, flowability, gas inclusion, etc.), and thereby improve the microstructure and mechanical properties of the workpiece. In addition, cost reduction can be achieved by increasing the yield of powder and reusing the powder.

(2) In terms of equipment, on the one hand, it is necessary to improve the forming efficiency, forming accuracy, and reduce costs of the equipment; In addition, large-scale industrial grade printing equipment needs to be developed to gradually achieve large-scale production and application.

(3) In terms of testing, with the development of 3D printed materials towards large-scale, complex, and precision, many traditional non-destructive testing methods have blind spots and require the development of new non-destructive testing technologies; Online detection technology through real-time monitoring of organizations and defects is one of the key research directions in the future; In addition, establishing and improving non-destructive testing standards is the basis for the widespread application of 3D printing technology.

(4) In terms of technology, further optimize the process of 3D printing technology, suppress defects during the forming process, and improve the mechanical properties of the formed parts. The key issues such as the evolution of internal stress, deformation and cracking behavior, and defect generation mechanism during the forming process are still key issues that need to be studied in the future.