Hi Lokesh,
You can change the Name of the field from "TechldentNo" to "No. Of Cavity" . the process is given below
1. Go to CMOD. follow the path " Goto - Text enhancement - keyword --- change"
2. Give Data Element as "TIDNR" click ok.
3. Change the Field description and save it.
4. It will ask you for Request creation. Create A Request and check it.
This will change filed name as per you want in Report also.
Check it and confirm.
Regards,
Chaitanya Parchure