Additive manufacturing (AM), popularly known as 3D printing, has been increasingly popular in recent times, drawing attention from both academia and industry. It has been developing at a fast pace, and in recent years it has left its original purpose of being a prototyping technology, and it has become a true manufacturing technique, suitable for the production of end parts, especially through metal additive manufacturing. The industry that currently uses additive manufacturing to the greatest extent is the aerospace sector, in which cost is not a strong constraint, and the benefits of additive manufacturing are profoundly valuable (optimized design, weight reduction, internal channels for cooling, improved mechanical properties).