Give one word or a phrase for the statement
The substance prepared by adding other metals to a base metal in appropriate proportions to obtain certain desirable properties.

Explanation

**Step-by-Step Text Solution:**

1. **Understanding the Statement**: The question asks for a term that describes a substance created by mixing a base metal with other metals in specific proportions to enhance certain properties.

2. **Identifying Key Terms**: The key terms in the statement are "base metal," "adding other metals," "appropriate proportions," and "desirable properties." This indicates that we are looking for a term related to metallurgy.

3. **Defining the Concept**: In metallurgy, when different metals are combined, they form a new substance that often has improved characteristics compared to the individual metals. This process is common in creating materials that are stronger, more resistant to corrosion, or have other beneficial properties.

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