Description:This volume contains contributions presented at the IUTAM Symposium on Micro- and Macrostructural Aspects of Thermoplasticity. The symposium brought together 87 eminent scientists from 13 countries working in the field of thermoplasticity with the aim of exchanging ideas and stimulating interaction. The majority of the lectures covered the main theme of the symposium, with a few of a more general keynote nature and a memorial lecture devoted to the work of Th. Lehmann. This volume begins by presenting basic questions of material modelling. Problems encountered in polycrystalline materials are also discussed and the transition from the micro- to the macroscale is the subject of several papers. The special handling of shape memory materials, phase transformation, and damage is emphasized. A couple of papers are devoted to experimental results and the various aspects of numerical treatment. It has become clear that previously cited problems, though approached from different viewpoints, may often be handled similarly. Moreover, the processing of special cases sensitized for a more accurate treatment in details. The volume will be of interest to researchers in the field of thermoplasticity.