We're talking steel. Not titanium vs steel or steel vs tungsten. A pinch of this and that difference in different steels won't make enough of any change to density. So if you want thicker, and thicker will always baton better, you get more mass, it's unavoidable unless you more than double the length to keep it thin and get it heavier and that adds in its own problems. Thin and long will never be as tough as shorter and fatter. That mass won't go to waste, just so happens to make it a great chopper now. What good does a thin light great batoning blade do for you if its so light you need to pack a chopping tool? Not much good for me.
I was going to let this go, but it bothers me to see people with good, valid and correct points or questions being shouted down. Some of this has to do with technique, skill, and personal choice for the rest there is proven mathematical and, scientific facts as well as empirical evidence. To that point I would like to rase the fallowing points
1) one can change the mass of a blade with out changing the thickness by adding more length or belly
2) if the blade is not moving like when batonind then it's mass has ether no effect on it ability to preform work or technically it adversely effects it become it adds inertia that has to be over come. how ever it's width dose have great effect. I know this is a little thing but it is important deference.
3) a wedge (wide blade) is only a better botoning tool if one is
splitting end grain, a wide blunt edge and blade are treble for
batongin cross grain.
4) on my trip to the Amazon last year the indigents guide did not use a blade any thick then 3/32" they preferred a light thin blade as that they could swing them faster with more energy ( Energy =mass x (velocity x velocity) ) without it fatiguing them. they also like the thin blades because they cut better and after all that is the first purpose of a knife (i know these were machetes but the deference had gotten lost here). At base camp we built a kitchen with tables and benches ,a thatched roof, 3 back palm bow, 2 blow guns, assorted fish spear, fishing poles,built gear storage, harvested food, and building materials, while using nothing but an ax, machetes, wood wedges and a belt knife. Now that i think about it with the exception of felling the tress and the first planks I never used a blade thicker then 3/32.
5) Hell there are places in this wide world wear one dose not need a "chopper"
6) but in many parts of say the north east a hatchet or an tomahawk pared with a belt knife is a better choice. if they are thin and light with hight ginds both tools can wight the same as a big thick chopper
7) as a former infantryman (both mounted and dismounted),a hyper light packer, and some one who grew up going on both long and short hunts I can tell you one would much rather carry a thin light more efficient blade then a thick heavy blade that is less efficient.
8) as prevues posters have mentioned determining the efficiency of the blade is primarily about the geometry, a knife edge is typical a double incline plane and physics tell use the lower the angle the more efficient the incline plain.
9) to reiterate a wide blade would only be better for splitting wood end to end it would be far less effective for cutting cross grin, or cutting in general.
10) if one really need to do a lot of splitting or to split some thing big wedges or a stick with a wedge tip asa very effective wedge freeing one knife up to be a very effective cutting tool. In regards to the stick with a wedge tip if one uses two of them pulling then in opposite direction one gets an amazing amount of leverage,
frustration now purged I will return to my grinder