How can I move the dock title position to the center?

Hello, Jin,

In order to set TextAlignment property when a ToolWindow is floating I can suggest handling the FloatingWindowCreated event set the following properties as shown below:

private void RadDock1_FloatingWindowCreated(object sender, FloatingWindowEventArgs e)
{
    e.Window.FormElement.TitleBar.TitlePrimitive.StretchHorizontally = true;
    e.Window.FormElement.TitleBar.TitlePrimitive.TextAlignment = ContentAlignment.MiddleCenter;
}

I hope this helps. Should you have other questions do not hesitate to ask.

Regards,
Nadya
Progress Telerik