11th Anniversary Steel Gifts. Steel is one of the strongest, most durable metals in the world, and therefore a fitting gift idea for the 11th anniversary as the cord binding the marriage together can no longer be easily broken. Celebrating your eleventh wedding anniversary with a stylish steel gift will mean they will last as long as the memories that inspired them. Let MyGiftGenie help you out with our range of 11th anniversary steel gifts; or to ensure that you never forget any of your future anniversaries, why not sign up to our free anniversary reminder service?