Research progress on discontinuous reinforced titanium matrix composites

The discontinuous reinforcements can effectively improve the mechanical properties, wear resistance, high temperature strength, and oxidation resistance of the titanium matrix, broadening the application fields of titanium materials. Ceramic reinforced phases have become the preferred reinforcements for the discontinuously reinforced titanium matrix composites because of the high hardness, good wear resistance, thermal stability, and low cost, and the TiC particles and TiB fibers are the most widely used. In addition, the nano-carbon materials have also become the most potential reinforcement materials of titanium matrix composites in recent years, due to the excellent properties such as high elastic modulus and high tensile strength, the nano-carbon materials can effectively improve the strength and plasticity of the titanium matrix. In this paper, based on the selection of reinforcements, the research progress of the discontinuously reinforced titanium matrix composites were summarized in the last decade, the effects of different reinforced materials on the microstructure and mechanical properties of titanium matrix and the strengthening mechanism were summarized, and the further research direction was put forward, which provided a certain basis for improving the overall properties of titanium matrix composites and expanding their application.