Laser marking metal: Annealing
Unlike laser engraving, annealing does not remove any material and there is no ablation involved. Annealing does, however, produce a colour change in the material as it is heated. Please note that thin plates of stainless steel (approx. 1mm) may warp or bulge due to the heat that is produced during annealing. Therefore, try and avoid engraving large areas when such material is used.