Technological processes such as welding, braze welding or surface treatment utilising single-spot laser beams as welding power sources are well known and commonly applied. The improvement of technological processes and quality of treatment are subjects of research in terms of new laser welding technologies. The article presents attempted applications of several laser beams having various parameters in the braze welding of car body sheets, the welding of AlSi-coated high strength steels and in the making of polymer-metal joints.