The techniques used in representational and non-representational metal sculptures diverge significantly, reflecting their distinct artistic goals. Representational metal sculptures prioritize accuracy in depicting recognizable forms, requiring meticulous techniques like precise welding, hammering, and chasing to achieve lifelike details. Artists often use traditional metalworking methods such as lost-wax casting or repoussé to create figurative works with clear anatomical or object-based references.

In contrast, non-representational metal sculptures embrace abstraction, focusing on texture, shape, and spatial relationships rather than literal representation. Techniques here frequently involve experimental approaches like plasma cutting, torching for organic textures, or unconventional assemblage of found metal objects. The welding becomes more expressive, with visible seams and intentional distortions serving as aesthetic elements rather than being concealed.

Material selection also differs technically - representational works often use malleable metals like bronze for fine detailing, while abstract pieces may incorporate industrial materials like steel beams or scrap metal for their raw, unrefined qualities. The finishing processes vary too, with figurative sculptures typically receiving polished patinas, whereas non-representational works might retain oxidation or incorporate mixed media for conceptual impact.

Ultimately, the technical approach mirrors the philosophical divide: representational sculpture demands controlled execution to mirror reality, while non-representational work privileges spontaneous, process-driven techniques that prioritize artistic expression over visual fidelity. Both approaches continue to evolve as contemporary metal artists push the boundaries of traditional and experimental metalworking methods.