Wire　arc　additive　manufacturing　(WAAM)　technology　was　adopted　to　deposite　2Cr13　thin-wall　part　using　robotic　cold　metal　transfer　(CMT)　equipment;　the　process　stability,　phase　identification,　microstructural　evolution,　and　tensile　properties　in　different　layers　were　investigated.　The　results　showed　that　a　smooth　surface　was　obtained　for　each　layer　due　to　the　stable　droplet　transfer　process,　which　ensured　a　stable　deposition　process.　Positions　in　different　layers　had　no　significant　influence　on　the　structural　aspects　of　the　as-fabricated　part　according　to　XRD　results.　Elongated　ferrite　grains　and　fine-grained　acicular　martensite　within　the　matrix　in　the　top　layer　were　recrystallized,　instead　of　a　spatial　periodicity　of　martensite　laths　within　equiaxed　ferrite　grains　in　the　inner　layers.　Martensite　content　was　increased　gradually　away　from　the　base　metal　in　the　05-25　th　layers　except　nearly　100%　martensite　in　the　first　layer.　Long　axis　of　martensite　laths　was　randomly　distributed　in　the　X-Y　plane　in　the　both　top　and　middle　regions,　while　an　epitaxial　growth　parallel　to　the　building　direction　was　found　in　the　X-Z　and　Y-Z　planes.　Higher　homogeneous　ultimate　tensile　strength　(UTS)　and　strong　anisotropy　in　poorer　ductility　were　obtained　for　the　AM　part　when　compared　with　the　as-solutioned　counterpart.　Fracture　behavior　was　transformed　from　ductile　to　mixed-mode,　and　finally　to　brittle　from　the　01　st　layer　to　the　25　th　layer.　(C)　2018　Elsevier　B.V.　All　rights　reserved.