Specimens　of　duplex　stainless　steel　(DSS)　fabricated　by　selective　laser　melting　(SLM)　exhibit　excellent　strength　but　poor　plasticity,　which　has　limited　their　applications.　To　improve　the　plasticity　and　to　achieve　a　strength-plasticity　matching,　the　effect　of　the　laser　scanning　speed　on　the　density,　phase,　microstructure,　and　mechanical　properties　of　2205　DSS　specimens　fabricated　via　SLM　is　investigated.　The　results　reveal　that　the　molten　metal　is　solidified　according　to　the　kinetic　sequence　L　→　δ　+　L　→　δ　→　δ　+　γ　for　the　SLM　forming　process,　and　the　sample　is　completely　composed　of　the　ferrite　phase.　The　content　of　austenite　cannot　be　effectively　enhanced　by　a　change　in　the　laser　scanning　speed.　The　mechanical　properties　of　the　samples　are　primarily　affected　by　the　presence　of　pores.　A　scanning　speed　of　S700　(700　mm/s)　results　in　the　formation　of　fewer　pores,　which　gives　rise　to　a　high　yield　strength　of　896.80　MPa　but　a　poor　plasticity　of　15.34　%.　Decreasing　the　scanning　speed　to　below　700　mm/s　reduces　the　yield　strength,　but　it　also　significantly　increases　the　elongation.　The　elongation　of　the　specimens　fabricated　using　a　laser　scanning　speed　of　500　mm/s　increases　to　23.09　%,　and　they　exhibit　excellent　strength-plasticity　matching.　This　increased　elongation　at　lower　scanning　speeds　is　attributed　to　higher　density,　lower　dislocation　density,　decreased　number　of　grain　boundaries　and　the　higher　proportion　of　high-angle　grain　boundaries　(HAGBs)　of　the　specimens.　Therefore,　a　significant　decrease　in　the　scanning　speed　can　improve　the　plasticity　of　the　specimens　fabricated　by　the　SLM　method.　By　changing　the　laser　scanning　speed,　the　density,　microstructure　and　mechanical　properties　can　be　optimized　to　further　improve　the　plasticity　of　the　specimens.　©　2023