This book explores textile design as a fundamental component of fashion, examining its creative, technical, functional, and aesthetic roles in garment development. It discusses the principles, materials, processes, and applications of textile design, including fibres, yarns, weaving, knitting, printing, dyeing, and finishing techniques. The book also highlights the relationship between textile innovation, sustainability, technology, and contemporary fashion practices. Designed for students, researchers, and practitioners, it provides a systematic introduction to the historical development and current relevance of textile design within the global fashion industry.