研究了采用喷射沉积工艺制得的Ａｌ５．５Ｃｕ／ＴｉＢ２（２０％）自生复合材料的沉积态及挤压态显微组织：沉积态组织细小，颗粒分布均匀，颗粒与基体界面结合良好，很少出现孔洞，原铸态自生组织中呈针片状的ＴｉＡｌ３相消失而呈颗粒状分布，析出相细小弥散；挤压态组织中孔洞基本弥合，纵向组织具有一定方向性，颗粒分布有些不均匀（有一定的条带）。力学性能测试结果表明：喷射沉积后的Ａｌ５．５Ｃｕ／ＴｉＢ２自生复合材料的抗拉强度比铸态提高约５０ＭＰａ，延伸率则提高５００％左右，耐磨性能也有较大提高 The deposited and extruded microstructures of Al5Cu / TiB2 (20%) selfcomposited composites prepared by spray deposition were studied. The microstructures of the deposited composites were fine, the particles were uniformly distributed, the interface between the particles and the matrix was well bonded, Rarely appear holes, the original cast astigmatism was needle-like TiAl3 phase disappear and was granular distribution of precipitated phase fine dispersion; squeeze state tissue holes to close, the longitudinal organization has a certain direction, some of the particle distribution is not Uniform (with a certain band). Mechanical properties of the test results show that: after spraying the deposition of Al 5.5Cu / TiB2 in-situ composite tensile strength increased by as much as about 50MPa casting, the elongation is increased by about 500%, wear resistance has also been greatly improved