The official answer is most likely that the navigation links should be either left or right to indicate functionality in accordance with the principles of material design: https://material.google.com/layout/structure.html#structure-app-bar
however, you can get around this in a somewhat hacky way:
<div class="naxbar-fixed"> <nav> <div class="brand-logo center"> <ul> <li class="active"><a href="/page1">page1</a></li> <li><a href="/page2">page2</a></li> </ul> </div> </nav> </div>
wrapping your navigation bar in a div with the brand logo of the classes and focusing on the fact that you are fooling yourself into thinking that the menu is a logo, and this will center the links.
I believe that such a menu will disappear on a fairly small screen and may not behave the way you want it to.
Instead, you can use materialization bookmarks:
<div class="naxbar-fixed"> <nav> <div class="white-text"> <ul class="tabs center" style="width:20em;"> <li class="tab col s6 active> <a href="/page1">page1a> </li> <li class="tab col s6"> <a href="/page2">page2</a> </li> </ul> </div> </nav> </div>
This has the advantage of providing every link and equal width, but most likely you will need a little extra style and may require more work if you are interested in a mobile phone.
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