How to integrate ThingWorx with Aras PLM?

Well, doing a quick search I was able to find that they have a developer guide on their website.  The guide shows that you can integrate via SOAP.  So my suggestion would be to write a thingworx extension that handles the SOAP interface back to Aras. You should probably create the extension as a Thing Template so that you can use a configuration table for defining static properties like URL, username, and pw and then reference those values in your java code when building out the SOAP request.