Who has the most grand slam titles total?

Answer 1

depends on if you only mean singles play or singles/doubles in toto

A female holds the record for both, considering the "open era" and excluding junior titles

Singles titles -Margaret Court (24 titles)

singles/doubles - Margaret Court (62 titles)

Answer 2

Margaret Court has 24 individual Grand Slam titles. Roger Federer has the most individual Grand Slam Titles of any male tennis player at 16.

Answer 3

Martina Navratilova