Shaping the surface properties of structural materials is a series of processes that, through treatment and modification of the structure, lead to the achievement of the required mechanical, physical or chemical parameters, allowing to obtain enhanced adhesive or operational properties of the treated elements, including tribological, fatigue and corrosion properties. Given the wide range of applications for laser processing, only a few examples will be described below.

The achievement of high adhesive forces is of fundamental importance for the quality and technological correctness of the processes of applying protective and decorative coatings and joining, e. g. gluing various types of elements and materials.

Laser surface preparation offers the possibility of combining two treatments in one process. The basic treatment in this case is the cleaning of the substrate and the subsequent improvement of the physicochemical properties (including adhesion) through activation or surface development. High physicochemical efficiency is achieved by giving the surface a specific geometrical structure, but it is worth mentioning that there is no simple translation between roughness and the desired activation effect.

Laser processing can successfully replace abrasive, abrasive blasting, or chemical etching methods. In the case of aluminum, for example, it is possible to achieve effects like alodination. Properly selected processing parameters guarantee strong and predictable joints without surface defects, stresses, micro-cracks, or chemical changes that can weaken the bonds