To　avoid　the　coarse　microstructures　and　micro-segregation　of　traditional　ingots　affecting　the　improvement　of　material　strength‚　a　rapid　solidification　single-roll　melt　rotation　method　was　used　to　prepare　5%　TiB2　/　Al-Zn-Mg-Cu-Zr-Er　composite　material　ribbons‚　composite　bars　were　obtained　by　hot　extrusion　at　380　-　440　℃　‚　and　the　microstructures　and　mechanical　properties　of　TiB2　reinforced　aluminum　matrix　composites　were　studied　by　X-ray　diffraction‚　scanning　electron　microscopy‚　tensile　testing　and　other　analytical　methods.　Results　show　that　rapid　solidification　can　significantly　refine　composite　grains‚　microstructure　uniformity‚　the　grain　size　of　the　prepared　TiB2　reinforced　composite　ribbons　are　4　-　6　μm;　fine-grained　composite　ribbons　are　hot　extruded　to　obtain　bars‚　and　TiB2　particles　are　uniformly　distributed.　As　the　extrusion　temperatures　increase‚　the　tensile　strength　of　composite　bars　increases　from　381　MPa　to　445　MPa‚　and　the　grains　have　grown.　The　extrusion　temperature　of　420　℃　for　30　min　is　the　best　rapid　solidification　and　hot　extrusion　process　parameter　for　preparing　composites.　Rapid　solidification　technology　has　great　potential　for　grain　refinement　of　aluminum　matrix　composites.　©　2024　Beijing　University　of　Technology.　All　rights　reserved.