**3.2 Electrode wire**

The electrode wire to be used for the component fabrication by WAAM is driven by technological aspects based on the welding process concerned. The selections of electrode wire during WAAM are considered instrumental to the fabricated components performance. The wire gauge and the number of wires to be fed to the electric arc at a few of the welding process parameters definitely affect the performance measures such as the deposition rate, and the heat transfer behavior in the weld pool. This can brought welding defects like lack of fusion. The defects in the wire surface, like diameter variations, cracks, and some scratches could result in porosity within the deposited component. It has been proved that making use of high-quality wire results the lesser porosity in the welds. To handle carefully these defects, wire selection is very much important in WAAM fabrication.
