This study investigated the effect of the nano particles addition of on the mechanical characteristics of the aluminum 6061 alloy the reinforcement particles used are silicon carbide (SiC) and titanium dioxide (TiO2) nanoparticles the fabrication method completed by means of stir casting method. Different samples were fabricated and tested. The specimen's composition: pure Al-6061; Al-6061 with different weight percentages of SiC NPs and TiO2 NPs; or a combination of both nanoparticles of SiC and TiO2 at specific weight percentages. Scanning electron microscopy (SEM) was used to reveal the morphology of the nanoparticles used as Al 6061 reinforcements. Also, the morphology of MMCs was analyzed. Standardized tests evaluated the mechanical characteristics such as stiffness, flexural strength, and hardness of the specimens. The nanoparticle-reinforced samples showed significant improvement in mechanical properties compared to pure Al-6061. Further studies are needed to clarify the specific effects of TiO2 incorporation and the combined effect of TiO2/SiC nanoparticles.