An in-situ TiCp/Al composite was prepared by a thermal explosion/quick pressure method (TE/QP). The effect ofAl content on the reaction temperature as well as the reaction rate has been studied. Phase constituents and themicrostructure of the composites and the particle size of the reinforcement were analysed using X-ray diffraction (XRD)and scanning electron microscopy (SEM). The results have shown that TiCp/Al composite with 40~70 vol. pct TiCparticle reinforcement and high relative density can be directly obtained by TE/QP. TiC is the only reaction productwhen Al content in Al-Ti-C system is no more than 60 vol. pct, but AI3Ti phase will also form when Al content is morethan 60 vol. pct. Increasing Al content prolongs the initial reaction time, reduces the highest reaction temperatureand the reaction rate, and decreases the size of TiC particles. In addition, the microstructure of TiCp/Al compositeand the structure of interface between TiCp and Al are studied using SEM and transmission electron microscopy(TEM). The results show that the in-situ synthesized TiC particle has fcc cubic structure. The orientation betweenTiC particles and Al matrix can be described as (220)Ai//(022)Tic and [I12]Ai//[011]Tic- Results of the mechanicalproperty tests reveal that the ultimate strength (σ) and modulus (E) are 687 MPa and 142 GPa respectively whenthe Al content is 40 vol. pct. On contrary, 5 elongation increases by 3.2% with increasing Al content. An in-situ TiCp / Al composite was prepared by a thermal explosion / quick pressure method (TE / QP). The effect of Al content on the reaction temperature as well as the reaction rate has been studied. Phase constituents and themicrostructure of the composites and the particle size of the reinforcement were analyzed using X-ray diffraction (XRD) and scanning electron microscopy (SEM). The results have shown that TiCp / Al composite with 40 ~ 70 vol. pct TiCparticle reinforcement and high relative density can be directly by TE / QP. TiC is the only reaction productwhen Al content in Al-Ti-C system is no more than 60 vol. pct, but AI3Ti phase will also form when Al content is morethan 60 vol. pct. Increasing Al content prolongs the initial reaction time, reduces the highest reaction temperature and the reaction rate, and decreases the size of TiC particles. In addition, the microstructure of TiCp / Al composite and the structure of interface between TiCp and Al are studied using SEM and transmissivity ion electron microscopy (TEM). The results show that the in-situ synthesized TiC particle has fcc cubic structure. The orientation between TiC particles and Al matrix can be described as (220) Ai // (022) Tic and [I12] Ai / / [011] Tic-Results of the mechanical properties tests reveal that the ultimate strength (σ) and modulus (E) are 687 MPa and 142 GPa respectively whenthe Al content is 40 vol. Pct. On contrary, 5 elongation increases by 3.2% with increasing Al content.