There is the possibility that I, at some point, poo pooed thin pegs but in my last walk I had a shelter that takes a minimum of 6 pegs and works better with 8, so as usual I wanted a couple of spare ones.
That is a total of TEN pegs...
So I opted to take 2 of those thin Ti shepherd hook thingo .

I used those for the guylines.
As it happens , on the last pitch I had a beautifully flat and elevated rectangle for my floor area but an uneven and rocky vestibule and surrounding soil.
At this point the thin Ti pegs worked really well because it was very easy to push them in between the roots and rocky bits.
One of the guylines was right into the wind, still the peg did not move, in fact did not turn it self as I was sort of expecting.
My verdict : well worth looking into them.
(about 6g each. On my scale 3 are "15g" 4 between 20 and 25 g)
Available on eBay (nothing to do with me...)
Note : individually painted. I know that it looks superprofessional but I did it myself.
Franco