Engraving laser marking removes the material from the surface. During laser engraving, the work piece surface is melted and evaporated with the laser. Consequently, the laser beam removes the material. The thus produced impression in the surface is the engraving. This process is typically used for metals.
The marking process of annealing is basically a thermal reaction. No material is removed like with the engraving process. Annealing occurs when the laser beam applies heat to the surface of a parts material, slightly altering its properties, creating oxide layers. The result is a visible and permanent mark. This type of mark is also referred to as a heat mark. Carbon containing metals can be used for annealing and dark marking. Best annealing results on titanium, steel, stainless steel, cabide etc
In foaming, the laser beam melts a material. During this process, gas bubbles are produced in the material, which reflect the light diffusely. The marking will thus turn out lighter than the areas that have not been etched
Laser cutting is a process where a material is cut, and this can be for small & fine materials. Laser cutting simply involves the use of a focused laser beam to cut a wide-range of materials to a high-level of accuracy and repeatability