The invention relates to a method for welding at least two aluminum-containing components. Each of the components has a content of at least 75 wt.% of aluminum, preferably at least 90 wt.% of aluminum, and the welding process is carried out as a deep laser welding process, wherein a starting laser beam is separated into multiple sub-beams which are oriented towards the components so that multiple laser spots (12) are produced on a surface of the components, wherein the plurality of laser spots (12) traverse a welding contour on the surface of the components, and laser spot centers (15) of at least three laser spots (12) of the plurality of laser spots (12) are arranged in a ring formation (16). The invention is characterized in that the starting laser beam is generated by means of a multi-fiber, in particular a 2-in-1 fiber so that the plurality of lasers spots (12) have a respective core component (13) and a ring component (14) on the surface of the components. The average power density in the core component (14) is greater than the average power density in the ring component (13). The invention also relates to a method for welding two aluminum-containing components, said method allowing media-tight welding seams to be produced with a high degree of reliability.