This volume contains a selection of papers submitted to the 4th International Conference on Building Materials and Construction (ICBMC 2019, February 25-28, 2019, Singapore) and the 2nd International Conference on Materials Design and Applications (ICMDA 2019, April 13-15, 2019, Tokyo, Japan). The conference proceedings present recent advances in the field of building materials, concrete structures, ductility, crack resistance, fatigue, fracture mechanics, materials properties and technologies of materials processing.