<p>High performance and lightweight materials in aerospace, automotive and structural applications have generated great interest for using aluminium based metal matrix composites (MMCs). An optimum casting aluminium matrix for MMCs should be selected taking account of the conflicting requirements of the property criteria such as mechanical and thermal behavior, compatibility with reinforcement and cost. The goal of this work is the development of a robust, structured methodology for deciding which aluminium alloy series best fits the MMC casting process. A hybrid Multi Criteria Decision Making (MCDM) approach incorporating the Analytic Hierarchy Process (AHP) and Technique for Order of Preference by Similarity to Ideal Solution (TOPSIS) was implemented. Using expert input from 17 professionals in academia and industry, nine critical criteria and the weighting were identified. Wrought and cast aluminium alloys were evaluated in six alternatives. Criteria weights using the AHP method and TOPSIS method for ranking alternatives based on weighted performance scores were performed. An 6xxx series alloy was found to possess the best combination of mechanical strength, corrosion resistance, process compatibility and cost as the most suitable alloy system for use as the matrix material. Stability of the rankings was confirmed by sensitivity analysis under variations in criteria weights. The hybrid model proposed in this work improves the decision making process by minimizing subjectivity and improving accuracy and evaluation time. These results provide useful information to material engineers or designers. Future work may include incorporating sustainability metrics and advanced fuzzy logic based models to improve strategies of material selection.</p>