The samples were marked using a 20 watt q-switched ytterbium fiber laser with 160 mm focal length lens. The parts were ablated, to burn off the anodization without engraving into the aluminum, creating brightly contrasting marks. The parts were marked using the laser at its full power of 20 watts, at a speed of 5 inches per second, and with a frequency of 80kHz, resulting in a cycle time of 23.22 seconds.