利用 Ｔｉ与 Ｂ之间的自蔓延高温合成反应，经非自耗电弧熔炼工艺制备了 ＴｉＢ增强的钛基复合材料借助 Ｘ射线衍射（ＸＲＤ）、扫描电镜和透射电镜分析了复合材料的物相和增强体的形态．结果表明：只存在ＴｉＢ增强体和α－Ｔｉ原位合成增强体ＴｉＢ的形貌与其Ｂ２７晶体结构密切相关，ＴｉＢ增强体容易沿［０１０］方向生长而长成柱状短纤维其柱面由（１００）；（１０１）和（１０１）组成 TiB reinforced titanium matrix composites were fabricated by self-propagating high temperature synthesis reaction between Ti and B by X-ray diffraction (XRD), scanning electron microscopy and transmission electron microscopy. The phase composition of the composites And enhance the body’s shape. The results show that TiB reinforcements and in-situ TiB reinforcements are closely related to their B27 crystal structures. TiB reinforcements tend to grow in the [010] direction and grow into columnar short fibers with (100) ); (101) and (101)