Despite their wide presence in hcp metals. incoherent tilt grain boundaries (ITGBs) are rarely studied. In this work. first-principles calculations were combined with atomic-resolution HAADF-STEM analyses to investigate the structure and formation of one special type ITGB in an Mg-Gd alloy featured with a unique Gd-rich cluster segregation pattern. https://chefesquipmenters.shop/product-category/sheeps-foot-paring-knives/