I know that werden is needed to form the future tense, and in the present tense, it means roughly "to become."
However, in the following sentence:
Herr Maier möchte eine Weltreise machen, obwohl es sehr teuer wird.
I failed to work out the meaning of the second subordinate clause
obwohl es sehr teuer wird.
Does wird ( = made from "werden") function the same way as "sein" i.e.
Mr Maier wants to make a trip around the world, even though it is very expensive.