The antonyms for the phrase "became enraged" would be calm, relaxed, tranquil, composed, peaceful, placid, and serene. These words represent the state of being calm and collected, opposite of being angry and upset. When an individual is calm, they do not let their emotions get the best of them, and they can make decisions with a clear mind. Being relaxed means that an individual is not feeling any stress or anxiety, and they are content with their surroundings. Tranquil and serene represent a peaceful state of mind, while placid refers to a genuinely calm and undisturbed state. Composed refers to the act of keeping your emotions in check and only expressing them when necessary.