In the proposed research project on form-fit and force-fit joining with adapted auxiliary joining parts, a new approach to the forming joining of materials using auxiliary joining parts is to be investigated. The central research idea of this sub-project is the individual inline adaptation or design of the auxiliary joining parts in the process in combination with a correspondingly adapted process control during joining, so that the process can change individually with each joining point. The general process sequence is initially divided into three sub-steps: 1. thermo-mechanically mould the individually adapted auxiliary joining part. 2. joining with the auxiliary joining part and finally 3. separating the auxiliary joining part. The auxiliary joining part is produced and customised in the joining tool from semi-finished products, such as wire sections or tubes, using a new process similar to pressing, and remains on the starting material until it is separated. This makes it possible to individualise each individual joint. The special thermo-mechanical process control enables the auxiliary joining part to be optimally adapted to the locally required joining conditions, including heat treatment by the process-induced frictional heat. The aim is to open up the widest possible range of joints and joining partners with one joining device. As part of sub-project C03, a holistic approach (analysis, simulation, design, integration into corresponding production process chains and quality assurance) will be used to investigate the fundamental research of process strategies for form-fit and force-fit joining with adapted auxiliary joining parts. The aim is to develop a versatile and robust overall joining process that can be used for a variety of material combinations and thicknesses, such as metal/metal to metal/composite joints, with minimal set-up effort or a redesign of previous process chains, and that can be customised to meet specific requirements.