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Additive manufacturing (AM) is a modern developing group of technologies based not on material removal, but on the layer-by-layer growth and synthesis of an object according to a CAD (computer-aided design) model. The main disadvantages of objects manufactured by AM technologies are a high degree of porosity and surface roughness. This study examines the possibility of modifying the surface of additive materials Ti Al V and AlSi Mg by irradiation with Ar ions with energies ranging from 2 to 9 keV. Using SEM, the surface topography was obtained before and after irradiation and mechanical polishing. A reduction in surface porosity and roughness was demonstrated, as well as the influence of beam energy on the final surface topography. [ABSTRACT FROM AUTHOR]