Boehmite (-AlOOH) is an important raw material in industry, for catalytic applications or polymer nanocomposites, among others [1,2], as it serves as precursor for the production of alumina (Al2O3) phases through calcination. The effect of the morphology on the thermal transformation of boehmite remains poorly understand. This internship project aims to explore the impact of boehmite morphology on phase transition to -Al2O3 upon thermal annealing. The first objective will be to determine the parameters controlling size and morphology of boehmite nanoparticles synthesized under hydrothermal conditions. The second objective will concern the investigation of the role of the initial morphology on phase transitions upon thermal annealing on a selection of samples with the most contrasting morphologies combining lab and synchrotron-based experiments.