Aluminum-silicon composites have been used extensively in several engineering applications. The objective of the present work is to investigate the wear and friction of Al-Cu-TiC-Si composites during both dry and periodic lubricated sliding conditions. The used materials were Al-Cu-TiC-Si composites fabricated using P/M technique with silicon content in the range 0-20 wt. %. The experimental work was conducted using a pin on disk configuration, within a load range of 15-100 N and a sliding speed range 7.2-13.5 m/s, for sliding distances up to 16.1 Km. The effect of sliding speed, applied load on the wear rate, mean contact temperature and coefficient of friction were evaluated. Wear scars and debris was characterized by means of scanning electron microscopy (SEM) and X-ray analyzer. The obtained results indicate that, the wear rate depends on the level of applied load and silicon weight percentage. The wear rate and mean contact temperature changes from mild to severe at transition load, and this load increases as the silicon content increases up to 12 wt. %. In the periodic lubricated condition the wear rate, mean contact temperature, and coefficient of friction were about 1/10 which under dry condition. These aspects led to an improvement of tribological characteristics and probably shifted the transition from mild to severe wear regimes to higher critical load. The results of this study are useful for selecting materials for several engineering applications.