Waldemar Ziaja graduated in Aeronautical Engineering from Rzeszów University of Technology in 1992 and ever since he is engaged with Department of Material Science at the Faculty of Mechanical Engineering and Aeronautics of the Rzeszów University of Technology. He obtained his PhD degree in 1999. Scientific interests of Dr. Ziaja include relationships between processing, microstructure and mechanical properties of the advanced structural materials, mainly titanium and nickel based alloys. He is also working on modelling the microstructure dependant deformation of materials in fatigue and creep conditions including damage initiation and growth. Dr. Ziaja is an author and co-author of over 50 papers in domestic and international scientific journals and conference proceedings.