The objective of this study was to use stir casting to create aluminum matrix nanocomposites with a uniform dispersion of TiO2 nanoparticles to evaluate their effect on the performance of aluminum-based products. Microstructural analysis significantly reduced the grain size, with an average drop of 18.2%. This suggests that the TiO2 nanoparticles affect the mineral matrix, which improves the mechanical properties. With the incorporation of TiO2 particles, the results showed improvements in stiffness (6.97%), nominal stress (27.92%), actual failure stress (25.6%), and ultimate stress (26.1%). Outperforming commercially pure aluminum, the mechanical properties of the resulting nanocomposites were significantly improved by adding TiO2 nanoparticles into the aluminum matrix. Microstructural and X-ray diffraction (XRD) studies confirmed the beneficial effects of the addition of nanoparticles.