以ＡｌＴｉＯ２反应体系为基础，添加适量石墨粉，压制后在不同温度下进行反应烧结，从而确定了获得反应完全的Ａｌ２Ｏ３ＴｉＣ／Ａｌ铝基复合材料的烧结工艺参数，并对该复合材料的组织性能及反应机理进行了分析讨论。结果表明：碳的加入可完全抑制条状和大块状Ａｌ３Ｔｉ相的形成；ＡｌＴｉＯ２Ｃ体系在１２００℃反应烧结后，可制得硬度较高的Ａｌ２Ｏ３ＴｉＣ／Ａｌ原位复合材料，其显微组织中Ａｌ２Ｏ３和ＴｉＣ颗粒尺寸小于２μｍ。 Based on AlTiO2 reaction system, suitable amount of graphite powder was added and reacted at different temperatures after sintering to determine the sintering process parameters of Al2O3TiC / Al aluminum matrix composite with complete reaction. The organizational performance and reaction mechanism were analyzed and discussed. The results show that the addition of carbon can completely inhibit the formation of bar-like and bulk Al3Ti phases. After the reaction of AlTiO2C system at 1200 ℃, Al2O3TiC / Al in-situ composites with high hardness can be obtained. The microstructure of Al2O3 and TiC particles size less than 2μm.