Titanium and titanium alloys are limited in their application in complex environments due to their low hardness, poor wear resistance, and weak high-temperature oxidation resistance. Solid powder infiltration technology can effectively improve the surface hardness, wear resistance, and high-temperature performance of titanium and its alloys. The solid powder infiltration temperature, insulation time, and infiltration agent all have a significant impact on the morphology of the infiltration layer. The infiltration of carbon and boron elements can significantly improve the surface hardness and wear resistance of titanium alloys, while the infiltration of aluminum elements can enhance the high-temperature oxidation resistance of titanium alloys and strengthen the adhesion between the infiltration layer and the substrate. By adjusting the process, a multi-component infiltration layer structure can be prepared, thereby achieving excellent comprehensive performance. However, there are still problems to be solved, such as loose surface of the boride layer, weak adhesion between the boride layer and the substrate, incomplete multi-element solid powder infiltration technology, and long infiltration time and high temperature.
