The 11th International Workshop for Bifurcation and Degradation in Geomaterials (IWBDG 2017), organized by the Aristotle University of Thessaloniki and the University of Cyprus, will take place on 21-25 May 2017 in Limassol, Cyprus. IWBDG 2017 is supported by ALERT-Geomaterials. A special session in tribute of Prof Hans Muhlhaus will be organized by Profs A Dyskin and E Pasternak Univ of Western Australia. Sessions in Experimental modeling of instabilities, localization and degradation/ Constitutive modeling and multi-physical couplings for localization, instabilities and degradation of geomaterials/ Geomechanics for Energy, Environment and Geophysics/ Numerical modeling of failure, localized deformation and gravity driven flows/ Micromechanics and multi-scale analysis of instabilities and degradation/ Soil-tool interaction. More details in http://www.cyprusconferences.org/iwbdg2017.