Titanium　aluminide　composite　reinforced　with　submicron　Al2O3　has　been　prepared　by　a　reactive　hot　press　method　using　TiO2,　Al　and　Ti　powder　as　source　materials.　The　reaction　synthesis　processing　is　particularly　investigated.　Results　show　that　the　matrix　of　the　as-prepared　material　is　a　mixture　of　TiAl　and　a　small　amount　of　T13Al　Fine　Al2O3　particles　that　act　as　reinforcing　phase　are　dispersed　along　the　interface　of　the　matrix.　The　reduction　of　TiO2　involves　many　transitional　stages,　including　Ti-Al　reaction,　TiO2-Ti　reducing　reaction,　reaction　between　TiO2　and　AI,　etc.