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The concept of controlling the properties of polycrystalline materials through a directional change of grain boundaries (GB) properties, so-called GB engineering, is actively developed. Segregation of the active component in multicomponent metallic systems can improve the characteristics of materials, but it is also able to cause embrittlement of polycrystals, which leads to catastrophic consequences. However, there is no universal approach, which allows predicting the stability of GB complexions for an arbitrary GB.