如何设置DXRibbonWindow的称号，其中心

我使用DXRibbonwindow这样的：如何设置DXRibbonWindow的称号，其中心

<dxr:DXRibbonWindow x:Class="MyNameSpace.MyRibbonWindow" 
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
    xmlns:dxn="http://schemas.devexpress.com/winfx/2008/xaml/navbar" 
    xmlns:dxb="http://schemas.devexpress.com/winfx/2008/xaml/bars" 
    xmlns:dxd="http://schemas.devexpress.com/winfx/2008/xaml/docking" 
    xmlns:dxlc="http://schemas.devexpress.com/winfx/2008/xaml/layoutcontrol" 
    xmlns:dxr="http://schemas.devexpress.com/winfx/2008/xaml/ribbon" 
    xmlns:dxmvvm="http://schemas.devexpress.com/winfx/2008/xaml/mvvm" 
    SnapsToDevicePixels="True" 
    WindowStartupLocation="CenterScreen" WindowState="Maximized" 
    Title="title"> 
    <Grid> 
     ... 
    </Grid> 
</dxr:DXRibbonWindow>

我想要的标题是在窗口的标题栏的中间，但它没有，怎么我可以做到吗？我正在使用DevExpress 14.2.5。