The graph shows a noticeable change in slope in the hybrid composites after the pseudo-yield point where the carbon layer failed and the fragmentation of carbon fibre took place. However, there was not enough stress and strain value after the initial failure for the glass-carbon/epoxy composite. The fragmentation of the carbon layer and crack propagation were visible in the specimen and progressively covered the whole specimen (Fig. -ii-iii). However, there were no visible changes on the specimen surfaces observed for GNP-coated glass-carbon/epoxy composite after initial failure (Fig. -ii and 5c-ii). Some changes were observed on the specimen surfaces before ultimate failure (Fig. -iii and 5c-iii). The pseudo-yield strain of untreated and GNP-coated hybrid composites was between ∼1.53% to ∼1.56%, which is higher than the pure carbon fibre fabric composite failure strain (∼1.26%). These results indicated that the hybrid effect occurred in all glass/carbon hybrid composites. A previous study reported an enhancement in the strain at failure of LS material up to 20% for very thin plies glass/carbon hybrid composite. The effect of GNP coating on the pseudo-ductile properties of GNP-glass-carbon/epoxy composites with different GNP concentrations is shown in Fig. . Both 1 and 5 wt.% GNP-coated glasscarbon/epoxy hybrid composites showed an excellent pseudo-ductile response during tensile loading.