Porous Mo2Ti2AlC3 was synthesized by reactive synthesis of the mixed powder of molybdenum, aluminum, titanium hydride and graphite at 1500 °C. The effects of sintering temperature on the phase transition and pore structure parameters of porous Mo2Ti2AlC3 were deeply discussed, and the pore forming mechanism in the sintering process was further deduced. The results showed that the pore formation of porous Mo2Ti2AlC3 consists of the following aspects: (i) At 500 °C, stearic acid was completely pyrolyzed; (ii) At 700 °C, titanium hydride was co...