The Fraunhofer Centre for High Temperature Materials and Design (HTL) develops high-temperature components for energy, propulsion and heat technology. It is active in applied research on Ceramic Matrix Composites (CMC), ceramic fibres and high-performance ceramics. The ceramic fibres are developed and produced on a pilot plant scale from synthesis of the precursor, via the spinning process to pyrolysis and coating of the filaments. CMC components are developed in a closed process chain, from component design, through the design of materials to pilot plant scale production. Different ceramics are used depending on the application. The components are designed using finite element methods. For the testing of high-temperature materials and the optimization of manufacturing processes, thermo-optical measuring devices (TOM) are developed. Components with dimensions up to 700 mm are also characterized in a special computer tomography device (CT).