Click on the Settings/Gear icon on the top right side
Select Preferences
Open the Forwarding tab
Click the Unlink option
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Android
Open the Titan application on your Android device
Click on the profile avatar from the top right corner
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Click on "Manage accounts on this device"
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Under Manage Accounts, find your Gmail account mentioned and click on "Unlink"
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Confirm the unlinking, by clicking on "Yes, unlink" on the pop-up box
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Your Gmail account forwarding is now unlinked from your Titan account.
iOS
Open the Titan application on your iOS device
Click on the profile avatar from the top right corner
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Click on "Manage accounts on this device"
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Under Manage Accounts, find your Gmail account mentioned and click on "Unlink"
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Confirm the unlinking, by clicking on "Yes, unlink" on the pop-up box
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Your Gmail account forwarding is now unlinked from your Titan account.
Next, as an optional step, you can delete the Gmail folder from the Titan interface. Deleting this folder will not delete any data from your Gmail mailbox.