AUTHOR=Chen Liang-Yu , Chai Linjiang , Zhang Lai-Chang TITLE=Editorial: Hexagonal Close-Packed Metals and Alloys: Processing, Microstructure and Properties JOURNAL=Frontiers in Materials VOLUME=8 YEAR=2021 URL=https://www.frontiersin.org/journals/materials/articles/10.3389/fmats.2021.645339 DOI=10.3389/fmats.2021.645339 ISSN=2296-8016