<p>This work proposes comparing two manufacturing routes for fabricating a CoCrMo composite reinforced with boron. The sintering process is driven by eutectic reactions between Co and B, thereby reducing the composite’s manufacturing temperature. Conversely, in the electric arc-melting process, boron acts as a boride-forming agent. Both materials were characterized using scanning electron microscopy, X-ray diffraction, and microhardness tests. The microstructure obtained was dendritic for the casting-manufactured sample. Meanwhile, sintered samples exhibit two main phases: the residual CoCrMo matrix and the eutectic liquid composed of CoB and Co₃B, as confirmed by X-ray analysis. Regarding hardness, values greater than 700 HV are observed, which are higher when arc melting is used, mainly due to the residual porosity left by incomplete diffusion during sintering. The microstructure developed is quite different, despite the presence of similar phases.</p> Graphical abstract <p></p>