Targets surface modification and transverse microsections after irradiation was studied by optical microscopy, SEM and hardness tester. Formation on tungsten surface of three different crack networks with typical cell sizes of 1000, 10 and 0.3 ¦Ìm and bubbles are identified. The network of large cracks extend perpendicularly to the irradiated sample surface to a depth of 50-350 ¦Ìm. Erosion depth depends on energy loads - rises from 20 to 200 ¦Ìm at 2 and 4 MJ/m<sup>2sup> correspondingly. Cracking, development of tungsten surface morphology and droplets splashing are discussed.