In this study, neat glass (NG) fiber and hybrid GF/Al-wire mesh composites with two different aluminum configurations (AG: with Al in the outer surface, and GA [Glass fiber/Al-mesh]: with Al in the core) were fabricated using hand-layup technique and then drilled via an abrasive water jet (AWJ) machine. The impact of the drilling parameters on the hole qualities; delami- nation Fd, kerf angle (Ka), and circularity error (Ce) of the holes were studied. Using Taguchi L9 orthogonal array, drilling operations were conducted. The following AWJ drilling parameters were chosen; water pressure (P), stand-off distance (S), and traverse speed (V) with three levels each. A single-objective optimization using Taguchi method was performed to minimize the drilling responses for the least outcome. In addition, gray relational analysis (GRA) was used as a multi-decision technique. Analysis of variance (ANOVA) was carried out to identify the impacts of AWJ drilling parameters. The results indi- cated that for AG specimen, Fd was reduced by 5.3%–10.96% and its Ce by 10.4%–29.65%. GA had the lowest kerf angle. The most effective parameters on delamination for NG, AG, and GA were P, followed by S and V. Validation tests showed small variations between experimental and predicted values.