Right click on the icon whose title you want to remove and select Rename. Instead of entering any characters in the text box, hold down the ALT key and type 255 (ALT + 2 + 5 + 5).

Note you need to use the NUMPAD numbers for this to work (i.e. the numbers to the right of your arrow keys, not the ones at the top of the keyboard).

When you release the ALT key the title will be blank, and you can press ENTER to accept this (blank titles are usually denied under Windows, but not this way).

For every other icon for which you wish to remove the title, do the same as above, but for each subsequent icon you'll have to add a '255' to the end of the string you enter.

That is, to blank a second icon name, you'll need to hold down ALT and type 255 then 255 again, then release ALT. For a third, you'll have to type ALT 255 255 255, and so on.