Yes there IS a little trick…
Titan as default will keep the .edl extension. And that stops it from being recognised by Nuendo as a AES31 file.
There are two very simple solutions to this.
In Titan when naming the export, change the extension to .adl/.ADL , or just rename it in the finder (I have to do this using CMD-I to get info, unlock and then change it, For some reason it doesn’t work for me doing it straight in the finder every time).
Then you will get a AES31 file that imports just fine in Nuendo. On a mac no less 