Cold　Metal　Transfer　(CMT)　welding　was　performed　on　laser　powder　bed　fusion　(L-PBF)　AlSi10Mg　alloys　using　ER5183　and　ER5356　Al-Mg　filler　wires.　The　effects　of　the　ER5183　wire　on　the　porosity,　microstructure,　and　mechanical　properties　of　the　welded　joints　and　weld　metal　(WM)　were　compared　with　those　of　the　ER5356　wire.　The　results　show　that　the　porosity　and　pore　size　in　the　WM　produced　with　the　ER5183　wire　are　reduced　relative　to　those　in　the　WM　produced　with　the　ER5356　wire.　The　ultimate　tensile　strength　(UTS)　of　the　welded　joints　made　with　ER5183　and　ER5356　wires　is　224.5　and　222.6　MPa,　respectively,　reflecting　a　similarly　reduced　UTS　compared　to　the　base　metal　(BM).　Fractures　in　the　welded　joints　occur　in　the　non-dendritic　equiaxed　zone　(EQZ),　which　may　be　attributed　to　the　enhanced　heterogeneous　nucleation　of　Al3Ti　particles,　facilitated　by　the　increased　Ti　content　from　both　the　BM　and　the　filler　wires.　Additionally,　the　WM,　excluding　the　EQZ,　shows　UTS　values　of　267.6　and　238.4　MPa　for　the　ER5183　and　ER5356　wires,　respectively.　These　findings　suggest　that　the　WM　produced　with　ER5183　wire　exhibits　a　significantly　higher　UTS　compared　to　that　produced　with　ER5356　wire.　This　enhancement　can　be　attributed　to　factors　such　as　increased　solid　solution　strengthening,　grain　boundary　strengthening,　texture　strengthening,　the　presence　of　nanosized　Si　precipitates　and　Si　network　boundaries,　and　the　load　transfer　effects　of　the　Si-rich　networks.　Moreover,　the　UTS　of　the　WM　with　the　ER5183　wire　is　19.2　pct　higher　than　that　of　the　corresponding　welded　joint.