Metal matrix composites (MMCs), a subset of composite materials, are widely utilized in defense, aerospace, automotive, and other industries. Tribo-mechanical properties are crucial in these applications, and proper machining of MMCs is necessary for their effective use. This article analyzes the effects of various reinforcements, including their weight percentage, particle size, and preheat temperature, on the tribo-mechanical and machinability characteristics of MMCs. It was found that increasing the reinforcement weight percentage generally enhances the properties of MMCs; however, an excessive amount can reduce performance due to particle agglomeration at higher concentrations. Stir casting emerged as the most commonly used fabrication technique, valued for its simplicity and effectiveness in uniformly distributing the reinforcement within the matrix. Additionally, this article explores the potential of incorporating waste materials into metal matrices to enhance their properties and make them more functional. Various reinforcements, including oxides, carbides, borides, and nitrides, are also examined, focusing on their use in powder form for MMCs.