**5. Conclusions**

Low-alloyed magnesium alloy ZN11 was processed by hot extrusion and ECAP. The microstructure, texture, and mechanical properties were studied in detail and the main results can be summarized as follows:

The microstructure of the sample after 8 ECAP passes is fine-grained (with an average grain size of 1.5 μm) and contains significant residual strain and a large number of tiny secondary phase precipitates, which were identified as ordered Guinier–Preston zones.

The mechanical strength increased with an increasing number of ECAP passes. In the specimen after 8 ECAP passes, the microhardness was 1.5 times higher than that of the as-extruded condition. However, the yield compression strength (YCS) increased more rapidly. The YCS of the 8P sample was roughly 2.4 times higher than that of the as-extruded condition.

The effect of texture on deformation mechanisms was studied and Schmid factors were calculated. Measurements and calculations exposed the significant activity of tensile twinning 1012 during compression loading in the ED, whereas work-hardening predominantly mediated by slip activity was observed during tensile loading in the extrusion direction.

**Author Contributions:** Conceptualization and methodology, J.S. and P.M.; investigation, P.M., S.Š. and J.V.; resources, J.B. and R.K.; writing—original draft preparation, J.S. and P.M.; visualization, P.M. and S.Š.; project administration, J.S. and J.K. All authors have read and agreed to the published version of the manuscript.

**Funding:** This research was funded by GACR project number 19-08937S. P.M. acknowledges partial financial support by ERDF under project No. CZ.02.1.01/0.0/0.0/15 003/0000485.

**Conflicts of Interest:** The authors declare no conflict of interest.
