<p>Hybrid aluminum metal matrix composites exhibit exceptional strength-to-weight ratios, wear resistance, and thermal stability, making them ideal for advanced applications in the automotive and industrial sectors. This review critically analyzes a broad spectrum of reinforcement types—including SiC, Al₂O₃, B₄C, graphite, CNTs, and industrial waste-based fillers—and correlates their functional contributions with various processing routes and application-specific requirements. A novel classification framework is introduced, integrating reinforcement performance, sustainability considerations, and processing compatibility. Comparative benchmarks demonstrate that hybrid systems such as Al + SiC + MoS₂ can achieve up to 50% improvements in hardness and 60% reductions in wear rate. Key challenges related to reinforcement dispersion, interfacial bonding, and standardization of tribological evaluation are addressed. The review concludes by outlining future research directions, including AI-guided material design, eco-efficient reinforcement strategies, and the development of application-specific hybrid systems. This work serves as a comprehensive reference for researchers and engineers involved in the design and optimization of next-generation HAMMCs.</p>