Aluminium alloys are still the main airframe materials used in aircraft industry due to their relative low cost, light weight and high strength achievable with heat treatments. The conventional method of fabricating components with this material is a subtractive process from a solid block. This leads to high buy-to-fly ratio hence, high cost per part due also to time to manufacture and machining costs. Wire + Arc Additive Manufacturing (WAAM) represents an opportunity to reduce waste and time to manufacure. This additive manufacturing technology is well suited for large-scale parts being characterized by a high deposition rate and promising to reduce also machining time.