The　wire　arc　additive　manufacturing　(WAAM)　2Cr13　thin-wall　part　was　deposited　using　robotic　cold　metal　transfer　(CMT)　technology,　and　the　location-related　thermal　history,　densification,　phase　identification,　microstructure,　and　mechanical　properties　of　the　part　were　explored.　The　results　show　that　pre-heating　effect　from　previously　built　layers　can　be　effectively　used　to　reduce　residual　stresses;　cooling　rate　firstly　decreased　rapidly　and　then　kept　stable　in　the　15th-25th　layers.　The　peaks　of　the　alpha-Fe　phase　of　the　AM　part　drifted　slightly　toward　a　relatively　smaller　Bragg＇s　angle　as　a　result　of　solute　atoms　incorporation　when　compared　with　that　of　the　base　metal.　Small　amounts　of　pores　were　present　with　the　absence　of　cracks　in　different　layers,　being　indicative　of　a　high　densification　level.　As-deposited　microstructure　consisted　of　martensite　and　ferrite,　along　with　(Fe,　Cr)(23)C-6　phase　precipitated　at　alpha-Fe　grain　boundaries.　Martensite　content　increased　gradually　from　the　5th　layer　to　the　25th　layers,　indicating　that　metastable　martensite　partly　decomposed　into　stable　ferrite　due　to　the　carbon　atoms　diffusion.　The　hardness　and　UTS　changed　slightly　in　the　05th-15th　layers　and　then　increased　quickly　from　the　20th　layer　to　the　25th　layers　at　the　expense　of　ductility;　the　fracture　process　transformed　from　ductile　(01st-10th　layers)　to　mixed-mode　(15th-20th　layers),　and　finally　to　brittle　fracture　(25th　layer).　The　findings　above　suggest　that,　despite　the　emergency　of　few　pores　and　slightly　inadequate　ductility,　this　robotic　CMT　technology　is　a　feasible　method　to　obtain　desired　microstructures　and　enhanced　mechanical　properties　for　the　WAAM　2Cr13　part　in　comparison　with　its　as-solutioned　counterpart.