Titleist has a one year warranty on it's equipment. You need to take it back to the Titleist account (retail store/proshop, etc.) where you purchased the bag with your receipt. They can contact contact Titleist regarding replacement or repair.

Limited One-Year Warranty Information
Although Titleist is committed to satisfying golfers with golf products of superior performance and quality, there is a chance a warranty claim may arise.

Acushnet Company warrants its Titleist products for a period of one year from the date of purchase against defects in materials or workmanship. Should your Titleist product fail to perform for either of the above reasons, we will at our option, repair it or replace it with an equivalent product at no charge. To obtain the benefits of this warranty, please contact your local golf shop to set up a Return Authorization. If you need assistance locating a shop in your area, please visit the Titleist Golf Shop Locator. Enclose the original receipt along with an explanation of the defect in writing. We ask that all parts of the product be returned to the repair department and that the product remain in original factory condition. Warranty claims presented without the original sales slip will be reviewed at our sole discretion. Acushnet Company reserves the right to inspect all warranty claims to determine the extent of warranty applications. All products returned for warranty claims become the property of Acushnet Company.