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This study deals with the laser stereolithography manufacturing feasibility of copper-nickel nanowire-loaded photosensitive resins. The addition of nanowires resulted in a novel resin suitable for additive manufacturing technologies based on layer-by-layer photopolymerization. The pure and nanowire-loaded resin samples were 3D printed in a similar way. Their morphological, mechanical, thermal, and chemical properties were characterized. X-ray computed tomography revealed that <inline-formula><math display="inline"><semantics><mrow><mn>0.06</mn><mrow><mtext> </mtext><mi>vol</mi><mtext> </mtext><mo>%</mo></mrow></mrow></semantics></math></inline-formula> of the composite resin was filled with nanowires forming randomly distributed aggregates. The increase of <inline-formula><math display="inline"><semantics><mrow><mn>57</mn><mo>%</mo></mrow></semantics></math></inline-formula> in the storage modulus and <inline-formula><math display="inline"><semantics><mrow><mn>50</mn><mo>%</mo></mrow></semantics></math></inline-formula> in the hardness when loading the resin with nanowire was attributed to the load transfer. Moreover, the decrease in the glass transition temperature from <inline-formula><math display="inline"><semantics><mrow><mn>57.9</mn><mtext> </mtext><mo>°</mo><mi mathvariant="normal">C</mi></mrow></semantics></math></inline-formula> to <inline-formula><math display="inline"><semantics><mrow><mn>52.8</mn><mtext> </mtext><mo>°</mo><mi mathvariant="normal">C</mi></mrow></semantics></math></inline-formula> in the polymeric matrix with nanowires evidenced a decrease in the cross-linking density, leading to a higher mobility of the polymer chains during glass transition. Consequently, this research demonstrates the successful dispersion and use of copper-nickel nanowires as a reinforcement material in a commercial resin for laser stereolithography.