Women's World Boxing Championship
Venue: Garfield Sobers Stadium, Bridgetown, Barbados Dates: 9-18 September
Taylor wins world women's boxing title (UK only)
Ireland's Katie Taylor took her third world title in sensational fashion, defeating China's Cheng Dong 18-5 at the World Women's Boxing in Barbados.
The 23-year-old lightweight opened up an eight-point lead inside two rounds, then cruised to the gold medal.
Another Chinese fighter, Cancan Ren, earlier outclassed England's Nicola Adams to win the flyweight final 10-5.
Teenager Savannah Marshall, from Hartlepool, lost a poor welterweight final to American Andrecia Wasson.
Women's boxing will make its Olympic debut at the London Games in 2012.
This is the first World Championships in the sport since the announcement that it would be included in the London Olympic programme.
It is therefore the first opportunity for fighters to lay down a marker, less than two years from the Games, and silver remains an achievement for Adams - who won a world medal of the same colour in a separate weight category two years ago.
Following that success, she missed the 2009 campaign with a career-threatening back injury which confined her to bed for four weeks at one stage, but looked in fine form in Barbados until China's Ren cleverly wore her down.
Two silver medals here shows Great Britain is an up-and-coming force in women's boxing
GB performance director
Adams, 27, led 2-1 after the first round but Ren roared back, punishing the Leeds boxer on the counter-punch to win 10-5.
"I would have loved to have gone one better than last time and win the gold, but I am happy with the way I have performed this week," said Adams.
"This time last year, I was ill and did not know if I would ever compete again so to win a medal is a great feeling."
Taylor - winner of world gold in 2006 and 2008, before the Olympic announcement - immediately made her mark on Dong with a left hook.
Despite being shorter and lacking the reach of her rival, Taylor's agility and quick thinking soon began to tell, and she landed a magnificent right-left combination at the start of the second round to move 6-2 in front.
By the third, another sublime left hook had taken her 11-2 ahead, and despite largely coasting through the final round she came out the victor by 13 points.
Marshall, 19, breezily defeated Marichelle de Jong of the Netherlands 14-4 to reach the welterweight final - but barely showed up in the first half of Saturday's title fight as a similarly disappointing Wasson struggled to a 2-0 lead.
A two-point penalty for a public warning against Wasson in the third levelled things up, such was Marshall's inability to score otherwise, though that also served to spark a little life into the fight.
But Wasson soon regained a narrow lead and controlled a nervous-looking Marshall until the end, holding on for a 5-4 victory.
"It was a very close contest and I was disappointed to lose by a single point," said Marshall.
"This week has been a great experience and to win silver in my first World Championships is brilliant.
"I have a lot of scope to improve between now and 2012 - when I hope to go one better."
Rob McCracken, GB boxing's performance director, said: "To secure two silver medals at the World Championships is a fantastic achievement and shows that Great Britain is an up-and-coming force in women's boxing.
"Nicola and Savannah have boxed fantastically throughout the tournament and their success here augurs very well for the Olympics in 2012."
Of the other British competitors in Barbados, light-welterweight Chantelle Cameron was beaten 16-4 by Russia's Vera Slugina in the quarter-finals earlier in the week, while Welsh light-flyweight Lynsey Holdaway was beaten 9-2 by India's Mary Kom, who went on to lift her fifth world title.
England duo Sharon Holford and Amanda Coulson both made early exits from the competition.
Marshall and Adams miss out on gold