利用钛与B4C之间的自蔓延高温合成反应经普通的熔铸工艺原位合成制备了TiC和TiB增强的钛基复合材料。光学金相、EPMA、TEM和X射线衍射的研究结果表明 :存在两种不同形状的增强体 ,即短纤维状TiB晶须和等轴、近似等轴状TiC粒子。TiB与Ti基体界面洁净 ,没有明显的界面反应 ,而TiC与Ti基体界面有非化学配比的TiC过渡层存在。由于增强体承受载荷 ,基体合金晶粒细化以及高密度位错的存在 ,制备钛基复合材料的室温和高温性能有了较大的提高 TiC and TiB reinforced Ti-based composites were prepared by in-situ synthesis by a common casting process using self-propagating high temperature synthesis reaction between titanium and B4C. The results of optical metallography, EPMA, TEM and X-ray diffraction show that there are two kinds of reinforcements of different shapes, namely short TiB whiskers and equiaxed and approximately equiaxed TiC particles. The interface between TiB and Ti matrix is ​​clean and there is no obvious interfacial reaction. However, there is a non-stoichiometric TiC transition layer at the interface between TiC and Ti matrix. The room-temperature and high-temperature properties of Ti-based composites have been greatly improved due to the increase of the load on the reinforcement, the grain refinement of the matrix alloy and the existence of high-density dislocations