Let's take things from start ,while trying to decipher what the diagram is showing .
Heating of the chamber starts at about 25°C .
First click is heard ,when the chamber temperature is about 100°C .
The VC is removed from the IH device when chamber temperature is a bit less than 120°C .
Up till this point the heat is transferred
from the chamber to the load ,
mainly via conduction = transfer of heat via
direct contact of the chamber wall with the load particles
and the further diffusion of heat amongst the load particles .
At this point also ( labeled at chart as "removed from IH " ) if instead of drawing a toke ,
the VC was left to cool at ambient temperature of 25°C ,the curve will have had followed
a rising trend with continuously decreasing Δ temp/Δ time ratio.
At best case it would have reached up to 150°C and no more .
That should be tested to be verified ,but I'm betting on that one.
It can be easily "predicted" just by studying carefully the curve of the graph
and maybe applying some maths also ( "trend" ) .
150° at best case .
That's some 6-8 °C below THC boiling point at sea level pressure.
"Start draw " happens when chamber temperature is at ~ 130° C .
And by the end of the draw it has reached 180°C .
As you can easily see the load and the chamber were "preheated" at about
130-140°C .
Then the cool incoming air ,while drawing, conducts the heat from the hot chamber
and passing through the load it rises it's temp up to 180°C .
Convection is the heat transfer due to bulk movement of molecules within fluids.
Hot air passing through a (preheated) load ,
falls in that category,in terms of heat transfer
from solid(chamber) to fluid (air) to solid (load) again.
During this brief period is when the main extraction is taking place.
At the same time the chamber wall temperature has dropped considerably.
But the load itself is still " boiling " hot .
Furthermore,when the second draw is taking place the load temperature is still above 160°C.
And by the end of it it has dropped down to 130°C .
Almost at the same temperature it had when the fisrt draw had begun.
I'm not quite sure about the 10/90 percentage ratio ,but
i'm pretty sure what is going on from ambient tempearture up to 130°-140°C
and what from 130°-140°C up to the max temperature ( 180-200°C ) .
Cheers.
EDIT :
@Stu ,please if possible run again the measurement ,but
this time ,after removing from IH device ,just let it cool ,
without any drawing.
I'm pretty sure that the conductive energy transfer of the stored heat ,
will not rise the chamber & load's temperature over 150°C.
( Note : With ~16.5 W/mK value of heat conduction ,both Ti and 316 L S.steel are not exactly
considered as good heat conductors ,at least comparing with other metals .
https://www.engineeringtoolbox.com/thermal-conductivity-metals-d_858.html )
And while IH heats the tip+Cap combo quite evenly surface-mass wise
(a triple jet lighter combined with fast VC spinning shall have more or less similar effect ),
things change with a single flame ( jet of simple ) .
depending where at the cap (& tip ) the heat is applied ,
and how fast the Vc is spinned then the diffusion of heat within the tip
and the amount being stored before the click is heard can be altered .
That has an immediate impact on the "preheat " temperature and
of course on the max temperature ( depends on the amount of stored heat ) achieved
with drawing .
The lower (towards the Vc stem) the heat applied to the cap ,
the higher the preheat temperature is going to be
and more heat is going to be stored at the tip,until the click.
The higher ( towards the tip of the cap ) the heat applied to the cap,
the lower the preheat temperature is going to be
and less heat is going to be stored at the tip,until the click.
The speed of VC "spinning" affects how evenly the heat is applied
and if hot spots are created or -rather- not.
Slow drawing for achieving max temperature.
Carb fully closed for maximum vapour extraction or
fully /semi open for some smooth clouds .
Golden ratio??? 
Any thoughts?
