Think of alloying like making a stronger concrete mixture by adding gravel to the cement; pure metal is like soft clay, while the alloy is like reinforced composite material.

Remember 'Bronze is a Tin bucket of Copper' (B-T-C: Bronze has Tin and Copper).

Alloying is the process of mixing a metal with other elements to enhance its mechanical properties. By adding tin to copper, the internal crystal lattice structure is altered, effectively disrupting the regular arrangement of copper atoms and preventing layers from sliding over each other, which increases the hardness and tensile strength of the resulting material.

For competitive exams, memorize the composition of key alloys: Brass ($Cu+Zn$), Bronze ($Cu+Sn$), Solder ($Pb+Sn$), and Steel ($Fe+C$).