Which outcome arises when tin content significantly decreases in ancient bronze casting?

💡 Explanation

When tin content decreases, de-alloying occurs because bronze's hardening mechanism relies on tin atoms distorting the copper lattice, and lowering tin reduces that distortion, softening the remaining alloy. Therefore reduced hardness results, rather than enhancing malleability, elevating the melting temperature or improving corrosion resistance which require higher tin concentration.

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