Read original post at Timmy Kokke's Blog
For a Windows Phone 7 application I’m currently working on I needed to change the font the titles of a couple of PivotItems on a Pivot control. Normally I won’t recommend using another font than Segoe WP for this, but sometimes the branding of the app leaves you no other choice.
Changing the font of the title turned out to be a lot harder than I thought. To spare you the trouble, here’s how it’s done in Expression Blend.