Why is the crucible so called

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…has a homophone, mettle which means natural ardour, spirit, strength or courage. These are some of the qualities John Proctor displays towards the end of the book as his mettle is tested and purified. The title is relevant to most of the themes and issues that the play explores. The title is very effective due the fact it is provocative and encourages one to reflect on the play, its meaning and also its contemporary truth.