Part of a decision when purchasing a tent is which poles to choose, the best choice will depend on your personal use case, but it is worth considering the following.

Fibreglass

Pros - Lightweight, flexible and compact, easy to repair with widely available parts

Cons - Not recommended for exposed campsites

Steel

Pros - Very strong and rigid, a great choice for large family tents

Cons - Heavier than fibreglass or alloy poles and usually a larger pack size

Alloy

Pros - Lightweight and strong, regularly used on lightweight back packing tents

Cons - Generally more expensive due to material costs