This book explores the idea that designed materials necessitate new relationships between material behaviour, specification and architectural representation. Designing Material Materialising Design focuses on the design of elastically tailored composite architectural structures. Emerging technologies around synthetic materials can now support the precise specification of materials and their properties. This book moves away from the concept of material as an unresisting receptacle for forms determined in advance to explore the architectural implications of synthetic materials and design methods for calibrated material behaviour. It includes case studies developed at the Centre for Information Technology and Architecture (CITA) at the Royal Danish Academy of Fine Arts, School of Architecture in Copenhagen. Novel concepts and operational models are illustrated that specify and materialise causal relationships between configuration and transformation. These projects reveal a new locus of architectural instruction that require new kinds of design information, new representational models, and different modes of design control.