重金属变音符号（英语：Heavy metal umlaut）是重金属和重摇滚乐团有时会在乐团或作品名称上加的两点元音变化符号。目的是让乐团看起来像是来自北欧或日耳曼民族地区，让人产生刻板印象中维京人或哥德人强壮勇猛的联想、或是哥德恐怖的气氛。例子有Queensrÿche、Blue Öyster Cult、Motörhead、The Accüsed、和Mötley Crüe。

这种「异国品牌包装」（foreign branding）的行为并不限于金属或摇滚乐团，如美国的冰淇淋品牌Häagen-Dazs，也不限于用元音上加两点的变音符号。反之并非所有乐团的变音符都是重金属变音符号，有些乐团团名用的语言本来含有元音变化符号，如冰岛歌手Björk的名字本来就有元音变化符号。

A metal umlaut is a diacritic that is sometimes used gratuitously or decoratively over letters in the names of hard rock or heavy metal bands—for example those of Blue Öyster Cult, Queensrÿche, Motörhead, The Accüsed, Mötley Crüe and Spın̈al Tap.

Among English speakers, the use of umlaut marks and other diacritics with a blackletter style typeface is a form of foreign branding intended to give a band's logo a Teutonic quality—denoting stereotypes of boldness and strength commonly attributed to ancient northern European peoples, such as the Vikings and Goths. Its use has also been attributed to a desire for a "gothic horror" feel. The metal umlaut is not generally intended to affect the pronunciation of the band's name.