This means that fiber laser light will be absorbed at a higher rate by metals than CO2 lasers when they are working with them.
If you’re cutting metals that are highly reflective, like aluminum, copper, or brass, and they are in the thicker side of cutting, then a plasma will be ideal. Lasers machines usually struggle with cutting reflective metals, especially if they are on thicker side. You’ll see that if you want to cut reflective metal, then you’ll need a higher amount of power to do so. And more power means more $$$.