In　this　research,　four　different　welding　arc　modes　including　conventional　cold　metal　transfer　(CMT),　CMT-Pulse　(CMT-P),　CMT-Advanced　(CMT-ADV),　and　CMT　pulse　advanced　(CMT-PADV)　were　used　to　deposit　2219-Al　wire.　The　effects　of　different　arc　modes　on　porosity,　pore　size　distribution,　microstructure　evolution,　and　mechanical　properties　were　thoroughly　investigated.　The　statistical　analysis　of　the　porosity　and　its　size　distribution　indicated　that　the　CMT-PADV　process　gave　the　smallest　pore　area　percentage　and　pore　aspect　ratio,　and　had　almost　no　larger　pores.　The　results　from　optical　microscopy,　scanning　electron　microscopy,　and　fractographic　morphology　proved　that　uniform　and　fine　equiaxed　grains,　evenly　distributed　Al2Cu　second　phase　particles　were　formed　during　the　CMT-PADV　process.　Furthermore,　the　X-ray　diffraction　test　ascertained　that　the　CMT-PADV　sample　had　the　smallest　lattice　parameter　and　the　highest　solute　Cu　content.　Besides,　the　tensile　strength　could　reach　283　MPa,　the　data　scattering　was　the　smallest,　and　the　strength　scattering　of　the　sample　in　the　horizontal　direction　was　the　shortest.　In　addition,　the　strength　properties　were　nearly　isotropic,　with　only　5　MPa　difference　in　the　vertical　and　horizontal　directions.　The　above　mentioned　results　indicated　that　the　mechanical　properties　of　2219　aluminum　alloy　was　improved　using　the　CMT-PADV　arc　mode.