Became deranged refers to a state of madness or mental imbalance. Antonyms for this phrase would, therefore, include words that carry the opposite meaning, such as: regained composure, became sane, regained control, regained rationality or returned to normalcy. These words describe the exact opposite of being deranged or insane, and instead, suggest a return to a calm and rational state of mind. While it is not always easy to control or restore one's mental state, it is important to remember that there are always options available for those struggling with mental health issues. Seeking professional support and care can help individuals reclaim their sense of stability and well-being.