The best Titleist golf ball for senior golfers depends on the individual golfer's swing speed and handicap. Most senior golfers have a slower swing speed and can benefit from the features of either the Titleist Velocity or Titleist NXT Tour S golf ball.
The Titleist Velocity is designed for high handicap golfers with a swing speed slower than 90 miles per hour. This ball is designed for low spin to allow for a straighter flight path. The Titleist NXT Tour S is more suitable for senior golfers with a slightly higher swing speed and a mid handicap. The NXT Tour S spins more off of the club face and gives more-skilled golfers greater control.