An electrode (24, 26) for use in a spark plug, comprising: a base (30, 42) extending to a base end (46, 68) said electrode (24, 26) including a firing tip (32, 38) having a tip end (56, 74) disposed adjacent said base end (46, 68), said firing tip (32, 38) including opposite tip sides (62, 80) extending continuously from said tip end (56, 74) to a firing end (58, 76), said firing tip (32, 38) presents a tip diameter extending between the opposite tip sides (62, 80) and a tip thickness extending from the tip end (56, 74) to the firing end (58, 76), and wherein the firing tip (32, 38) has an aspect ratio of 4.736 to 7.104, wherein the aspect ratio is equal to the tip diameter divided by the tip thickness, and wherein the tip diameter and the tip thickness are determined before welding the firing tip to the electrode base, said electrode (24, 26) including an electron beam weld (36, 40) between said electrode base (30, 42) and said tip end (56, 74) of said firing tip (32, 38), and said electron beam weld (36, 40) extending continuously between said opposite tip sides (62, 80), wherein said electrode base (30, 42) is formed of a nick-based material including nickel in an amount of at least 60.0 wt. %, based on the total weight of said nickel-based material, and said firing tip (32, 38) is formed of an iridium-based material, including iridium in an amount of at least 60.0 wt. %, based on the total weight of said iridium-based material, said electron beam weld (36, 40) includes a mixture of said nickel-based material and said iridium-based material, and said mixture extends continuously between said opposite tip sides (62, 80) further wherein said nickel-based material and said iridium-based material of said electron beam weld (36, 40) is re-crystallized, and said electron beam weld (36, 40) includes said re-crystallized nickel-based material and said re-crystallized iridium-based material each in an amount of at least 30% wt. %, based on the total weight of said electron beam weld (36,40). a base (30, 42) extending to a base end (46, 68) said electrode (24, 26) including a firing tip (32, 38) having a tip end (56, 74) disposed adjacent said base end (46, 68), said firing tip (32, 38) including opposite tip sides (62, 80) extending continuously from said tip end (56, 74) to a firing end (58, 76), said firing tip (32, 38) presents a tip diameter extending between the opposite tip sides (62, 80) and a tip thickness extending from the tip end (56, 74) to the firing end (58, 76), and wherein the firing tip (32, 38) has an aspect ratio of 4.736 to 7.104, wherein the aspect ratio is equal to the tip diameter divided by the tip thickness, and wherein the tip diameter and the tip thickness are determined before welding the firing tip to the electrode base, said electrode (24, 26) including an electron beam weld (36, 40) between said electrode base (30, 42) and said tip end (56, 74) of said firing tip (32, 38), and said electron beam weld (36, 40) extending continuously between said opposite tip sides (62, 80), wherein said electrode base (30, 42) is formed of a nick-based material including nickel in an amount of at least 60.0 wt. %, based on the total weight of said nickel-based material, and said firing tip (32, 38) is formed of an iridium-based material, including iridium in an amount of at least 60.0 wt. %, based on the total weight of said iridium-based material, said electron beam weld (36, 40) includes a mixture of said nickel-based material and said iridium-based material, and said mixture extends continuously between said opposite tip sides (62, 80) further wherein said nickel-based material and said iridium-based material of said electron beam weld (36, 40) is re-crystallized, and said electron beam weld (36, 40) includes said re-crystallized nickel-based material and said re-crystallized iridium-based material each in an amount of at least 30% wt. %, based on the total weight of said electron beam weld (36,40).