The effect of Ti/C (molar ratio) and Al content on phase constitution of combustion synthesized products by using Ti,Al,C and TiC powders as raw materials in the Ti Al C system has been studied. The experiment results show that the phase formation of combustion synthesized Ti3AlC2 powders are affected greatly by molar ratio of titanium to carbon and Al content in the raw materials. TiC is the main phase in the final product as the molar ratio of titanium to carbon is equal to 1 or 1.5, with little relationship to the amount of aluminum content. The Ti3AlC2 and Ti2AlC are the main phases in the final product as the molar ratio of titanium to carbon are equal to 2 and 3, respectively. Moreover, amounts of Ti3AlC2 and Ti2AlC increase in direct ratio with Al content, and later decrease with continuously increasing amount of Al. TiC is a medium product during the combustion process for the purpose of obtaining Ti3AlC2 powders.