The journal article titled "Axial-torsion behavior of superelastic tubes: Part I, proportional isothermal experiments" and located at https://doi.org/10.1016/j.ijsolstr.2020.03.018 contains results from a crystallographic texture analysis and 25 axial-torsion experiments. This large data set may be valuable to practitioners and researchers seeking to understand and model multi-axial SMA behavior, so we have made the data publicly available. Each directory in the repository corresponds to an experiment