In the article, the study of laser beam modulation influence on the structure of materials produced by one of the methods of additive manufacturing as selective laser melting (SLM) is provided. For the purpose of creating a smoother temperature gradient and the optimal conditions of the heat and mass transfer in the melting pool, an experimental stand for SLM-processing with the system of laser beam power density distribution modulation was created. The laser beam modulation gives promising results for higher parameters’ combinations such as power more than 150W and scanning velocity more than 50 mm/sec. The single track’s formation was produced by different power density distribution as Gaussian, Flat-top and Inverse Gaussian (Donut). All the received single tracks were studied with the use of optical and SEM microscopy. The results produce important data about reducing the width of powder consolidation zone, more even structure and higher productivity.