A　novel　method　in　semi-solid　state　and　by　helping　shear　force　has　been　tried　for　fabricating　aluminum　matrix　composites　reinforced　by　fibers　through　a　thixomixing　process　as　its　novelty.　Basalt　fibers　(with　the　volume　fraction　of　2,　4,　and　6%)　were　dispersed　into　molten　AA356　by　creating　shear　mixing　in　the　range　of　the　semi-solid　temperature　of　aluminum.　Shear　punch　tests　and　Brinell　hardness　were　utilized　to　study　the　mechanical　behavior　of　the　produced　composite　samples.　Also,　elemental　analysis　and　microstructural　investigations　were　performed　by　scanning　electron　microscopy　(SEM).　The　results　illustrated　that　the　shear　strength　and　hardness　were　simultaneously　improved　versus　higher　values　of　fibers,　which　resulted　in　the　improvement　of　the　ultimate　strength　of　the　composite　samples.　The　shear　strength　improved　to　132.3　MPa　(for　the　sample　with　6　vol.%　of　basalt　fibers)　from　119.1　MPa　(for　the　sample　without　fibers),　registering　an　11%　improvement.　Also,　the　hardness　value　increased　to　70.80　HB　from　62.3　HB,　registering　a　13.6%　improvement.　Moreover,　the　ultimate　tensile　strength　of　this　sample　was　enhanced　with　the　value　of　10.9%.　According　to　the　microstructural　results,　the　mechanical　properties　have　been　improved　due　to　the　formation　of　intermetallic　compounds　along　the　interface.　©　The　Minerals,　Metals　&　Materials　Society　2025.