Wire　and　arc　additively　manufactured　aluminum　alloys　are　prone　to　porosity,　leading　to　poor　mechanical　properties　in　samples,　which　hinders　their　broad　industrial　application.　Laser　and　arc　hybrid　processes　have　garnered　increasing　attention　for　their　potential　to　reduce　porosity,　stabilize　the　arc,　and　enhance　deposition　efficiency.　This　paper　investigates　the　porosity,　element　distribution,　microstructure　evolution,　and　mechanical　properties　of　2319　aluminum　alloy　produced　through　the　laser　and　cold　metal　transfer　(laser-CMT)　hybrid　additive　manufacturing　process.　In　comparison　with　the　as-deposited　samples,　the　laser-CMT　hybrid　process　decreases　porosity,　enhances　element　distribution,　mitigates　Cu　element　segregation,　and　results　in　increased　q00　phase　precipitation.　Following　T6　heat　treatment,　the　ultimate　tensile　strength　(UTS),　yield　strength　(YS),　and　elongation　of　the　x-direction　specimens　from　the　laser-CMT　hybrid　process　are　450.0　MPa,　318.1　MPa,　and　10.0%,　respectively.　These　values　are　11.27%,　7.03%,　and　36.65%　higher　than　those　of　the　as-deposited　samples.　To　validate　the　findings,　a　large-scale　load-carrying　frame　for　a　commercial　aircraft　was　fabricated,　demonstrating　the　efficacy　of　the　process.　The　paper　also　presents　a　detailed　analysis　of　the　strengthening　mechanism.　Samples　deposited　using　the　laser-CMT　method　exhibit　reduced　porosity　and　excellent　mechanical　properties,　making　this　process　promising　for　a　wide　range　of　applications.(c)　2023　The　Author(s).　Published　by　Elsevier　B.V.　This　is　an　open　access　article　under　the　CC　BY-NC-ND　license　(http://creativecommons.org/licenses/by-nc-nd/4.0/).