Smith was the only Brit to make the podium alongside Japan, Jamaica and Germany, and is now the second highest ranked British Epeeist
in the world at 210th.
Iona Pearson (Cardiff) was 32nd in her competition.
James Taylor has been named Welsh fencer of the year.
Taylor took the silver medal in the men's epee, beaten 15-11 in the final by defending champion Jon Willis, who is currently Britain's top-ranked epeeist
by some margin.
Top men's epeeist
Jon Willis - last year's winner - had to be content with second place this time around, beaten in the final by Tom Bennett, of London Thames Fencing Club, with fifth-placed Marc Burkhalter the top Welshman.
The 25-year-old epeeist
will compete in both the individual and team events in St Petersburg from September 28 to October 7.
The 24-year-old epeeist
is among 16 fencers accepted on to British Fencing's Olympic Pathway Programme which qualifies him for grant aid in return for training full-time at BF's elite training centre in Hornsey, North London, and overseas.
In warm-up for these championships , six Tunisian epeeists
, namely Jawhar Miled, Mohamed Mehdi Akrimi, Mohamed Aziz Ben Smida, Maya Mansouri, Dorra Ben Jaballah and Meriem Hayouni will leave to train in Cholet (France) next June 1-7.