Mechanical　properties　and　corrosion　resistance　of　copper-bearing　antibacterial　duplex　stainless　steel　were　investigated　by　SEM,　EDS,　tensile　test　and　electrochemical　measurement.　The　results　show　that　the　rich　copper　precipitate　has　effect　of　tensile　strength　increasing.　In　the　range　of　540-580℃,　with　the　aging　temperature　increasing,　the　rich　copper　phase　coarsening,　the　tensile　strength　and　plasticity　decrease,　and　fracture　from　ductile　fracture　to　quasi　cleavage　fracture　gradually.　In　30%　acetic　acid　solution,　with　the　rich　copper　phase　volume　fraction　increasing,　the　corrosion　resistant　improves.　©,　2015,　Chinese　Mechanical　Engineering　Society　of　Heat　Treatment.　All　right　reserved.