Which element`//` elements is`//` are alloyed with aluminium or tin in making air craft frames and jet engines and why?

Explanation

To answer the question regarding which elements are alloyed with aluminium or tin in making aircraft frames and jet engines, we can follow these steps:

### Step 1: Identify the Elements
The primary elements that are alloyed with aluminium in the context of aircraft frames and jet engines are **titanium** and **vanadium**.

### Step 2: Explain the Reason for Alloying
The reason for alloying these elements with aluminium is that they significantly enhance the mechanical properties of the alloy. Specifically, titanium and vanadium contribute to:

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