en گروه سرامیک Ceramic Materials and Engineering Research Paper Research Paper The present requirement of automobile industry is seeking lightweight material that satisfices the technical and technological requirements with better mechanical and tribological characteristics.&nbsp; Aluminium matrix composite ( AMC ) materials meet the requirements of the modern demands. AMCs are used in automotive applications as engine cylinders, pistons, disc and drum brakes. This paper investigates the effect of particle size and wt% of Al₂O₃/SiC reinforcement on mechanical and tribological properties of hybrid metal matrix composites (HMMCs). AA2024 aluminium alloy is reinforced with Al₂O₃/SiC different particle sizes (10, 20 and 40 &micro;m) and weight fractions (upto 10 wt %) were fabricated by using squeeze casting technique. HMMCs were characterized for its properties such asX-ray diffraction (XRD), density, scanning electron microscope ( SEM ), hardness, tensile strength, wear and coefficient of friction. AA2024/5wt%Al₂O₃/5wt%SiC with 10 &mu;m reinforced particle size showed maximum hardness and tensile strength 156.4 HV and 531.43 MPa and decrease in wear rate was observed from from 0.00307 to 0.00221 for 10N<strong>. </strong>Hybrid composites showed improved mechanical and wear resistance suitable for engine cylinder liner applications. Hardness, Density, Tensile, Wear, Squeeze casting, Particle size. 55 67 http://ijmse.iust.ac.ir/browse.php?a_code=A-10-1765-1&slc_lang=en&sid=1 M. Senthil Kumar msv305@yahoo.co.in 1800319475328460010426 1800319475328460010426 Yes VIT, Chennai,Tamil nadu, India R. V. Managalaraja mangl@udec.cl 1800319475328460010427 1800319475328460010427 No University of Concepcion, Concepcion, Chile. K. Senthil Kumar rsk1970@gmail.com 1800319475328460010428 1800319475328460010428 No Dhaanish Ahmed College of Engineering, Chennai,Tamilnadu, India. L. Natrayan natrayanphd@gmail.com 1800319475328460010429 1800319475328460010429 No VIT, Chennai,Tamil nadu, India