The phrase "assured of becoming" is correct and usable in written English.
It can be used when expressing confidence or certainty about a future outcome or status.
Example: "After years of hard work and dedication, she felt assured of becoming the next team leader."
Alternatives: "confident of becoming" or "certain of becoming".
If Djokovic wins again, he will be assured of becoming No. 1 after the tournament.
Despite Mr. Rudd's victory within his own party, he is not automatically assured of becoming the new prime minister.
But despite the 37-to-1 majority the measure received in the Senate, it is not assured of becoming law.
See articleShinzo Abe was virtually assured of becoming Japan's next prime minister after the ruling Liberal Democratic Party chose him as its leader.
As Mr. Schmidt noted, the winner of the Iowa Republican caucus is hardly assured of becoming the party's nominee; Mr. McCain lost there in 2008.
By this afternoon, his north Tehran home had become a place of pilgrimage for government ministers, provincial officials, presidential aides and many of the pro-Khatami reform candidates who seemed assured of becoming Iran's new power brokers.
And now Djokovic — after leaving his family as a teenager and traveling the world in search of an unlikely goal — was one victory from assuring himself of becoming No. 1 for the first time.
Weir Looking to Cap a Strong Year Mike Weir, in contention after an opening-round 68, would virtually assure himself of becoming the PGA Tour's player of the year by winning the championship this week.
Many of the temples at Angkor, all of which gave expression to Indian cosmological and mythical themes, were built in order to provide a locus for cults through which kings and other members of the royal family could be assured of immortality by becoming identified with Shiva or one of the other preeminent gods of the realm.
But he and others say approval is far from assured, and that instead of becoming a spark for biotechnology stocks, Amevive could become the next casualty.
James McAvoy delivers as a young Charles Xavier becoming more assured of his powers and his responsibility for the futures of both Mutants and humans.
