The results of development of composite materials on the basis of the aluminum matrix reinforced both by refractory nanosized particles (received via plasma-chemical synthesis) and intermetallic phases Al₃Ti formed in in situ reactions are presented. Influence of nanosized additives can be retraced on the example of varying the structure of composite materials, obtained via liquid-phase process as a result of exothermal reaction in situ. The conclusions about the influence of reinforcing particles and manufacturing procedures on the structure of composite materials are made.