<p>This study explores improving mechanical performance and moisture resistance in aramid fiber-reinforced epoxy composites using hybrid aluminum (Al) and graphite (Gr) fillers for precision engineering applications. Although aramid fibers are widely used for their high tensile strength and thermal stability, their susceptibility to moisture uptake and weak interfacial bonding limits their reliability in precision-manufactured components. To address these limitations, controlled proportions of Al and Gr fillers were incorporated into the epoxy matrix. Mechanical and water absorption tests confirmed significant improvements in tensile, flexural, impact, and interlaminar shear strength, along with reduced moisture uptake. Microscopic observations revealed uniform filler dispersion and strong fiber-matrix bonding, highlighting the synergistic effect of Al and Gr fillers in enhancing load transfer and structural integrity. These findings underscore the potential of hybrid filler-modified aramid/ epoxy composites for high-precision, lightweight structural applications in aerospace, automotive, and marine sectors, where dimensional stability and environmental resistance are critical.</p>