Though poor, he carried himself with a dignity 'becoming' [='befitting'] a king.
She won the election, 'becoming' the first woman to be President of the nation.
It's 'becoming' [='getting'] quite cold in the evenings.
(..) I must disappoint you, Harry. When I first met young Mr. Riddle, he was a quiet, albeit brilliant boy, committed to becoming a first-grade wizard. Not unlike others I've known. Not unlike yourself, in fact. (..)2009 Harry Potter and the Half-Blood Prince