CCD optimized PVA and alkali-treated ramie fibre composition for composite films. Hybrid composites were developed using 3D OTT and 2D intralaminar reinforcement, with jute as the primary fibre and sisal, curauá, and glass fibres as secondary reinforcements in the 2D architecture, while the 3D architecture incorporated a transverse fiber phase woven orthogonally through the preform thickness. NFRCs are increasingly popular due to their low cost, biodegradability, renewability, and specific mechanical properties. This study innovated NFRCs by varying coir and pineapple leaf fibre orientation, and the Taguchi method analyzed control parameters’ effects on their properties. AE techniques studied hydrothermal aging damage in unidirectional FFRCs soaked in distilled water at three temperatures.