From glasses and aero engines to stainless steel cookware and underwear, our lives are full of various materials. Materials and humans are shaped by each other. Although you may not be aware of it, scientific and technological advances related to those vital materials have inadvertently and profoundly influenced the development course of human society. Have you ever wondered why the crank pin is bent, why stainless steel does not rust, why the glass is transparent, how the unyielding steel and clear glass are made and what kind of history they have respectively? This lecture allows us to understand steel and glass from different perspectives and to appreciate the charm of materials.