<p>The present study outlines the contribution of various strengthening mechanisms to the yield strength of multiple reinforced aluminium matrix composites. The composite was characterized by XRD for phase identification, SEM and EDS, and TEM was used for particle distribution and morphology (shape and size). Observation showed homogenous dispersion of micron size Al₇Cr particles in the matrix, while Al₂O₃ particles as clusters. Though the presence of Al₂O₃ particles was observed as pockets of clusters, the overall presence of multiple particles improved the mechanical properties of commercially pure aluminium. The strengthening mechanisms, namely grain refinement, dislocation and Orowan, are quantified for these composites and, the combination of these is in accordance with observed experimental strengths. Dislocation strengthening is the predominant mechanism in the composites, followed by Orowan strengthening, and grain refinement strengthening has the least contribution.</p>