The title took over from the Evening Standard as the event's sponsor last autumn.
This spring's four-day event, at London's Natural History Museum, will open with an exclusive shopping evening for Grazia readers in aid of Fashion Targets Breast Cancer UK, at which £5.50 of every £15 ticket will be donated to the charity.
Collections from over 130 designers, including Betty Jackson, Billy Bag, Ella Moss, Gharani Strok, Jasper Conran and Paul & Joe will be on sale at reduced prices.
In raising Grazia's profile, the previous event helped the magazine to post a 20% rise in circulation in the second half of 2006 to 210,200.