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In Chapter 1, the purpose of thermomechanical processing and a historical survey is described. In Chapter 2, fundamental issues such as the kinetics of phase transformations and the refinement of grain size in steels are considered. In Chapters 3, 4 and 5, the techniques and the metallurgical bases for controlled-rolling in the recrystallization, nonrecrystallization and (alpha+gamma) regions are described. In Chapters 6 and 7, deformation resistance during hot-rolling and the restoration processes which will occur during or immediately after rolling are discussed. In Chapter 8, phase transformation during cooling following hot-rolling are mentioned. In Chapter 9, the effects of alloying elements, which play an important role throughout reheating, rolling and cooling are summarized. The mechanical properties of controlled-rolled steel are dealt with in Chapter 10, whilst the prediction and control of microstructure and properties by thermomechanical processes is covered in Chapter 11. The problems faced at present and the possibility for future developments are stated in Chapter 12.