WPA2 Enterprise TTLS PAP connection for iPad
Okay so I figured it out myself. Apple provides a configuration utility for configuring WiFi and some other settings.

For Windows - http://support.apple.com/kb/DL1466

For Mac - http://support.apple.com/kb/DL1465

I created a configuration profile using it and entered the WiFi settings there - 

Security Type - WPA/WPA2 Enterprise

Protocols

EAP Types - TTLS

Inner Identity - PAP

Authentication

Username - yourusername

Password - yourpassword

I then emailed this configuration profile to myself and opened it from my iPad and it worked.