Currently, blur method of Ti.UI.TextField is available only for Android and iOS.
But it does not work for Windows.
Here is the AppC documentation link for this method - http://docs.appcelerator.com/platform/latest/#!/api/Titanium.UI.TextField-method-blur
Attached the sample app to test.
Clicking anywhere else other than TextField on the screen will make TextField lose focus in Windows. But, we would like the blur event to happen on clicking return key in keyboard. To achieve this functionality, blur method is required for TextField.
In index.js of this project. the blur call on TextField has no effect.