In　the　field　of　metal　materials,　deformation　and　annealing　play　an　irreplaceable　role　in　improving　the　microstructure　and　optimizing　the　properties.　In　this　study,　we　prepared　Al0.5CoFeCrNiSi0.25　dual-phase　high-entropy　alloys　(DHEAs)　by　vacuum　arc　melting　and　investigated　their　microstructure　evolution　and　mechanical　properties　at　different　rolling　and　annealing　temperatures.　The　results　showed　that　the　volume　ratio　of　the　FCC　phase　remained　largely　unchanged　with　increasing　annealing　temperature,　with　only　small　recovery　for　10%　reduction　alloy.　In　contrast,　the　volume　fraction　and　recrystallization　ratio　of　the　FCC　phase　in　a　40%　reduction　alloy　increased,　and　its　recrystallization　rate　was　higher　than　that　of　the　BCC　phase.　Annealing　the　alloys　at　900　°C　formed　the　FCC,　BCC,　σ,　L12　and　B2　phases.　As　the　annealing　temperature　increased　to　1100　°C,　the　lamellar　structure　was　changed,　and　the　L12　and　σ　phases　dissolved,　leading　to　the　gradual　increase　in　the　spacing　size　and　volume　fraction　of　the　FCC　phase.　Increasing　the　annealing　temperature　reduced　the　yield　strength　but　enhanced　the　ductility　of　DHEAs.　Annealing　for　1　h　at　900　°C　after　40%　cold　rolling　enhanced　their　strength　to　1360.61　MPa　due　to　the　high　dislocation　density　and　presence　of　σ　phases　but　led　to　poor　ductility.　Annealing　for　1　h　at　1100　°C　after　40%　cold　rolling　produced　a　good　combination　of　tensile　strength　(∼1267.8　MPa)　and　ductility　(uniform　elongation　of　∼34.4%).　Such　remarkable　strength　and　ductility　may　be　attributed　to　the　increased　volume　fraction　of　the　FCC　phase　and　the　dual-phase　heterogeneous　deformation　induction　strain　hardening　effect.　©　2023