High-energy synchrotron X-ray diffraction is a novel and powerful tool for bulk studies of
materials. In this study, it is applied for the investigation of an intermetallic γ-TiAl based alloy. Not
only the diffraction angles, but also the morphology of reflections on the Debye-Scherrer rings are
evaluated in order to approach lattice parameters and grain sizes as well as crystallographic
relationships. An in-situ heating cycle from room temperature to 1362 °C has been conducted starting
from massively transformed γ-TiAl which exhibits high internal stresses. With increasing temperature
the occurrence of strain relaxation, chemical and phase separation, domain orientations, phase
transitions, recrystallization processes, and subsequent grain growth can be observed. The data
obtained by high-energy synchrotron X-ray diffraction, extremely rich in information, are interpreted
step by step.