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This study describes a severe plastic deformation processing technique for tubular materials, in the interest of enhancing mechanical properties via grain refinement and crystallographic texture control. The process, dubbed as tube equal channel angular extrusion (tECAE), is used to process the Mg–3Al–1Zn (AZ31) magnesium alloy at low temperatures. Mg alloys often suffer from low strength levels derived from coarse grain size, strong crystallographic texture, and mechanical anisotropy; hence, AZ31 acts as an ideal candidate for tECAE, as AZ31 and other Mg alloys tubes have excellent potential application in various industries. Here, the texture evolution of one pass of tECAE processing at 200 °C, 175 °C, and 120 °C was assessed, where tECAE produced drastically refined grains and increased strength levels after only one pass. The texture evolution and the active deformation modes, and their relative …