  Zirconium alloys are used in the nuclear industry as structural materials,
and can be subject to high strain rate loading conditions during forming and in
the case of a reactor accident. In this context, the relationship between
strain rate dependent mechanical properties, crystallographic texture and
deformation modes, such as slip and deformation twinning, are explored in this
work. Commercially pure zirconium is deformed to 10 % engineering strain under
quasi-static and high strain rate loading, and post-mortem analysis of the
samples is performed using electron backscatter diffraction (EBSD) to observe
different twin and slip systems activated. Twin types are identified from local
intergranular misorientation maps, and active slip systems are identified from
long range intragranular misorientation maps. We link characterisation of the
mechanical responses, twin types and morphologies, and relative slip system
activation as a function of loading mode. We find that variations in strength
and hardening can be related to the relative propensity of twinning and the
number of active slip systems.
