<p>Directed arc energy deposition (DED) is a new method for preparing bimetallic functional materials layer by layer, which has been increasingly more attention. IN625- S214 alloy bimetallic gradient materials were fabricated by CMT wire-arc swing deposition. The effects of heat input and deposition sequence on the interface evolution, composition segregation, and mechanical properties of IN625-S214 bimetals were examined. Results indicate that IN625-CuAl9 bimetallic materials with no metallurgical defects and high interfacial bonding strength were obtained by WAAM. Both IN625 and S214 deposits exhibited large columnar dendrites, and significant Mo, Nb segregation appeared at the interface by depositing S214 on Inconel 625. The fracture strength and interfacial bond strength of the bimetallic specimens were significantly higher than that of S214 bronze. S214/IN625 bimetals exhibited a composition transient width of 600&#xa0;μm and a microhardness of 385&#xa0;HV, attributed to (Cr, Mo) and Ni₃Al phase formation and solid solution strengthening. The tensile specimens all fractured at S214, and the fracture strength and interfacial bond strength of the bimetallic specimens were significantly higher than that of S214 bronze.</p> Graphical Abstract <p></p>