Which metal is best for tawa?

Could you please elaborate on why you are asking which metal is best for tawa? Is there a specific type of cuisine you're cooking, or are you looking for a metal that's durable, lightweight, or easy to maintain? Each metal has its own unique properties, such as aluminum being lightweight and conductive, iron being durable and naturally non-stick, and stainless steel being rust-resistant and easy to clean. Understanding your specific needs can help us determine the most suitable metal for your tawa.